Format JSON payload

rpi/services/mqtt_service.py

@@ -65,11 +65,7 @@ class MQTTService:
     def publish(self, topic: str, data: str, qos: int = 0):
         try:
             self.connect()
-            payload = {
-                "timestamp": int(time.time()),
-                "data": data
-            }
-            result = self.client.publish(topic, json.dumps(payload), qos=qos)
+            result = self.client.publish(topic, json.dumps(data), qos=qos)
             result.wait_for_publish()
         except Exception as e:
             print(f"An error occurred while publishing on {topic} on {self.address} : {e}")