diff --git a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/.idea/other.xml b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/.idea/other.xml
index a76f118..56676a7 100644
--- a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/.idea/other.xml
+++ b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/.idea/other.xml
@@ -256,6 +256,17 @@
           <option name="screenX" value="1812" />
           <option name="screenY" value="2176" />
         </PersistentDeviceSelectionData>
+        <PersistentDeviceSelectionData>
+          <option name="api" value="34" />
+          <option name="brand" value="samsung" />
+          <option name="codename" value="q6q" />
+          <option name="id" value="q6q" />
+          <option name="manufacturer" value="Samsung" />
+          <option name="name" value="SM-F956B" />
+          <option name="screenDensity" value="420" />
+          <option name="screenX" value="1856" />
+          <option name="screenY" value="2160" />
+        </PersistentDeviceSelectionData>
         <PersistentDeviceSelectionData>
           <option name="api" value="30" />
           <option name="brand" value="google" />
diff --git a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/ProxyClient.cpp b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/ProxyClient.cpp
index 894f6aa..8cb02a9 100644
--- a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/ProxyClient.cpp
+++ b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/ProxyClient.cpp
@@ -117,18 +117,20 @@ Java_com_example_locationshare_ProxyClientJNI_proxyClientDisconnect(JNIEnv *env,
 }
 */
 JNIEXPORT void JNICALL
-Java_com_example_locationshare_ProxyClientJNI_proxyClientPublish(JNIEnv *env, jclass, jlong clientHandle, jstring jContent) {
+Java_com_example_locationshare_ProxyClientJNI_proxyClientPublish(JNIEnv *env, jclass, jlong clientHandle, jstring jContent, jstring jEthereumPrivateKey) {
 
     const char* content = env->GetStringUTFChars(jContent, 0);
     uint64_t contentLength = strlen(content);
+    const char* ethereumPrivateKey = env->GetStringUTFChars(jEthereumPrivateKey, 0);
     LOGI("proxyClientPublish clientHandle: %d", clientHandle);
 
-    LOGI("proxyClientPublish string: %s", content);
+    LOGI("proxyClientPublish content: %s", content);
+    LOGI("proxyClientPublish ethereumPrivateKey: %s", ethereumPrivateKey);
 
     Error* errors = nullptr;
     uint64_t numErrors = 0;
 
-    proxyClientPublish(&errors, &numErrors, static_cast<uint64_t>(clientHandle), content, contentLength);
+    proxyClientPublish(&errors, &numErrors, static_cast<uint64_t>(clientHandle), content, contentLength, ethereumPrivateKey);
 
     env->ReleaseStringUTFChars(jContent, content);
 
diff --git a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/streamrproxyclient.h b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/streamrproxyclient.h
deleted file mode 100644
index 87c47f6..0000000
--- a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/streamrproxyclient.h
+++ /dev/null
@@ -1,63 +0,0 @@
-#ifndef LIBSTREAMRPROXYCLIENT_HPP
-#define LIBSTREAMRPROXYCLIENT_HPP
-
-#include <stdint.h> // NOLINT
-
-#if defined(__clang__) || defined(__GNUC__)
-#define SHARED_EXPORT __attribute__((visibility("default")))
-#define SHARED_LOCAL __attribute__((visibility("hidden")))
-#endif
-
-#if defined(__swift__)
-#define EXTERN_C
-#else
-#define EXTERN_C extern "C"
-#endif
-
-#define ERROR_INVALID_ETHEREUM_ADDRESS "INVALID_ETHEREUM_ADDRESS"
-#define ERROR_INVALID_STREAM_PART_ID "INVALID_STREAM_PART_ID"
-#define ERROR_PROXY_CLIENT_NOT_FOUND "PROXY_CLIENT_NOT_FOUND"
-#define ERROR_INVALID_PROXY_URL "INVALID_PROXY_URL"
-#define ERROR_NO_PROXIES_DEFINED "NO_PROXIES_DEFINED"
-#define ERROR_PROXY_CONNECTION_FAILED "PROXY_CONNECTION_FAILED"
-#define ERROR_PROXY_BROADCAST_FAILED "PROXY_BROADCAST_FAILED"
-EXTERN_C const char* SHARED_EXPORT testRpc();
-
-// this file should be in C, not C++
-
-static void __attribute__((constructor)) initialize();
-
-EXTERN_C struct SHARED_EXPORT Proxy {
-    const char* websocketUrl;
-    const char* ethereumAddress;
-};
-
-EXTERN_C struct SHARED_EXPORT Error {
-    const char* message;
-    const char* code;
-};
-
-EXTERN_C uint64_t SHARED_EXPORT proxyClientNew(
-    Error** error,
-    uint64_t* numErrors,
-    const char* ownEthereumAddress,
-    const char* streamPartId);
-
-EXTERN_C void SHARED_EXPORT
-proxyClientDelete(Error** errors, uint64_t* numErrors, uint64_t clientHandle);
-
-EXTERN_C uint64_t SHARED_EXPORT proxyClientConnect(
-    Error** errors,
-    uint64_t* numErrors,
-    uint64_t clientHandle,
-    const Proxy* proxies,
-    uint64_t numProxies);
-
-EXTERN_C void SHARED_EXPORT proxyClientPublish(
-    Error** errors,
-    uint64_t* numErrors,
-    uint64_t clientHandle,
-    const char* content,
-    uint64_t contentLength);
-
-#endif // LIBSTREAMRPROXYCLIENT_HPP
\ No newline at end of file
diff --git a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/streamrproxyclient.h b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/streamrproxyclient.h
new file mode 120000
index 0000000..5f7ddf1
--- /dev/null
+++ b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/cpp/streamrproxyclient.h
@@ -0,0 +1 @@
+../../../../../../../include/streamrproxyclient.h
\ No newline at end of file
diff --git a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/ProxyClientJNI.kt b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/ProxyClientJNI.kt
index 0db1c1a..4114dc0 100644
--- a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/ProxyClientJNI.kt
+++ b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/ProxyClientJNI.kt
@@ -34,7 +34,7 @@ object ProxyClientJNI {
     external fun proxyClientDisconnect(clientHandle: Long)
 */
     @Throws(StreamrProxyException::class)
-    external fun proxyClientPublish(clientHandle: Long, content: String)
+    external fun proxyClientPublish(clientHandle: Long, content: String, ethereumPrivateKey: String)
 
     data class Proxy(
         val websocketUrl: String,
diff --git a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/StreamrProxyClient.kt b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/StreamrProxyClient.kt
index 7d01670..31b8edc 100644
--- a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/StreamrProxyClient.kt
+++ b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/StreamrProxyClient.kt
@@ -16,7 +16,7 @@ class StreamrProxyClient(val state: StateFlow<LocationState>) {
     private val job = SupervisorJob()
     private val scope = CoroutineScope(Dispatchers.Default + job)
     private var publishingJob: Job? = null
-    private val validEthereumAddress = "0x1234567890123456789012345678901234567890";
+    private val validEthereumAddress = "0xa5374e3c19f15e1847881979dd0c6c9ffe846bd5";
     private val validStreamPartId = "0xd7278f1e4a946fa7838b5d1e0fe50c5725fb23de/nativesdktest#01";
     val proxyClientHandle = ProxyClientJNI.proxyClientNew(validEthereumAddress, validStreamPartId)
     companion object {
@@ -25,12 +25,15 @@ class StreamrProxyClient(val state: StateFlow<LocationState>) {
     var status: Status by mutableStateOf(Status.stopped)
         private set
 
-    var proxyAddress by mutableStateOf("0xfccf49c5a714cab640e329464c6f81d72df6e307")
+    var proxyAddress by mutableStateOf("0x2ee615edd5d13310f83d8125ff4f0960a7475e33")
         private set
 
     var proxyId by mutableStateOf("ws://10.0.2.2:44211")
         private set
 
+    var ethereumPrivateKey by mutableStateOf("23bead9b499af21c4c16e4511b3b6b08c3e22e76e0591f5ab5ba8d4c3a5b1820")
+        private set
+
     var intervalSeconds by mutableStateOf(defaultPublishingIntervalInSeconds)
         private set
 
@@ -42,6 +45,10 @@ class StreamrProxyClient(val state: StateFlow<LocationState>) {
         this.proxyId = proxyId
     }
 
+    fun updateEthereumPrivateKey(ethereumPrivateKey: String){
+        this.ethereumPrivateKey = ethereumPrivateKey
+    }
+
     fun updateIntervalSeconds(intervalSeconds: String){
         this.intervalSeconds = intervalSeconds
     }
@@ -55,7 +62,7 @@ class StreamrProxyClient(val state: StateFlow<LocationState>) {
             withContext(Dispatchers.IO) {
                 println("proxyClientHandle: ${proxyClientHandle}")
                 println("Publish: $data")
-                ProxyClientJNI.proxyClientPublish(proxyClientHandle, data)
+                ProxyClientJNI.proxyClientPublish(proxyClientHandle, data, ethereumPrivateKey)
                 println("Publish End")
             }
         }
diff --git a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/ui/LocationShareScreen.kt b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/ui/LocationShareScreen.kt
index e5761f8..915ef5c 100644
--- a/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/ui/LocationShareScreen.kt
+++ b/packages/streamr-libstreamrproxyclient/examples/android/LocationShare/app/src/main/java/com/example/locationshare/ui/LocationShareScreen.kt
@@ -48,6 +48,7 @@ fun LocationShareScreen(
         ProxyFieldsLayout(
             proxyAddress = locationShareViewModel.streamrProxyClient.proxyAddress,
             proxyId = locationShareViewModel.streamrProxyClient.proxyId,
+            ethereumPrivateKey = locationShareViewModel.streamrProxyClient.ethereumPrivateKey,
             status = locationShareViewModel.streamrProxyClient.status,
             onProxyAddressChanged = {
                 locationShareViewModel.streamrProxyClient.updateProxyAddress(
@@ -55,6 +56,7 @@ fun LocationShareScreen(
                 )
             },
             onProxyIdChanged = { locationShareViewModel.streamrProxyClient.updateProxyId(it) },
+            onEthereumPrivateKeyChanged = { locationShareViewModel.streamrProxyClient.updateEthereumPrivateKey(it) },
             modifier = Modifier
                 .fillMaxWidth()
                 .wrapContentHeight()
@@ -139,9 +141,11 @@ fun LocationShareScreen(
 fun ProxyFieldsLayout(
     proxyAddress: String,
     proxyId: String,
+    ethereumPrivateKey: String,
     status: Status,
     onProxyAddressChanged: (String) -> Unit,
     onProxyIdChanged: (String) -> Unit,
+    onEthereumPrivateKeyChanged: (String) -> Unit,
     modifier: Modifier = Modifier
 ) {
     val mediumPadding = dimensionResource(R.dimen.padding_medium)
@@ -187,6 +191,22 @@ fun ProxyFieldsLayout(
                     disabledContainerColor = colorScheme.surface,
                 )
             )
+
+            OutlinedTextField(
+                value = ethereumPrivateKey,
+                onValueChange = onEthereumPrivateKeyChanged,
+                label = {
+                    Text("Ethereum Private Key")
+                },
+                singleLine = true,
+                shape = shapes.large,
+                modifier = Modifier.fillMaxWidth(),
+                colors = TextFieldDefaults.colors(
+                    focusedContainerColor = colorScheme.surface,
+                    unfocusedContainerColor = colorScheme.surface,
+                    disabledContainerColor = colorScheme.surface,
+                )
+            )
             Text(text = "Status: ${status}")
         }
     }