uint64 timestamp # time since system start (microseconds)
uint8 client_id
uint8 request_type # id/read/write/clear
uint8 item # dm_item_t
uint32 index
uint8[56] data
uint8 STATUS_SUCCESS = 0
uint8 STATUS_FAILURE_ID_ERR = 1
uint8 STATUS_FAILURE_NO_DATA = 2
uint8 STATUS_FAILURE_READ_FAILED = 3
uint8 STATUS_FAILURE_WRITE_FAILED = 4
uint8 STATUS_FAILURE_CLEAR_FAILED = 5
uint8 status