public ResponseWrapper sendMessage(MessagePayload payload)
{
Preconditions.checkArgument(payload != null, "message Payload should not be empty");
String payloadString = this.ToString(payload);
Preconditions.checkArgument(!string.IsNullOrEmpty(payloadString), "payloadString should not be empty");
String url = HOST_NAME_SSL;
url += MESSAGE_PATH;
ResponseWrapper result = sendPost(url, Authorization(), payloadString);
return(result);
}