diff --git a/Model/Room.php b/Model/Room.php
index 297171b..8b290e8 100644
--- a/Model/Room.php
+++ b/Model/Room.php
@@ -93,8 +93,8 @@ public function toJson()
             $json['is_archived'] = $this->isArchived();
             $json['is_guest_accessible'] = $this->isGuestAccessible();
             $json['topic'] = $this->getTopic();
-            $json['owner'] = array('id' => $this->getOwner()->getId());
-        } else { //Paramters for POST call
+            $json['owner'] = is_null($this->getOwner()) ? null : $this->getOwner()->toJson();
+        } else { //Parameters for POST call
             $json['guest_access'] = $this->isGuestAccessible();
             if ($this->getOwner()) {
                 $json['owner_user_id'] = $this->getOwner()->getId();
diff --git a/Model/User.php b/Model/User.php
index 7d3d6cb..9657b3a 100644
--- a/Model/User.php
+++ b/Model/User.php
@@ -83,6 +83,7 @@ public function parseJson($json)
     public function toJson()
     {
         $json = array();
+        $json['id'] = $this->id;
         $json['name'] = $this->name;
         $json['title'] = $this->title;
         $json['mention_name'] = $this->mentionName;