diff --git a/libs/psa/mqtt_request.py b/libs/psa/mqtt_request.py
index 68fda28..364206e 100644
--- a/libs/psa/mqtt_request.py
+++ b/libs/psa/mqtt_request.py
@@ -16,6 +16,7 @@ class MQTTRequest:
         self.vin = vin
         self.req_parameters = req_parameters
         self.date = datetime.now()
+        self.data = {}
 
     def get_message_to_json(self, remote_access_token):
         return json.dumps(self.get_message(remote_access_token))
@@ -23,10 +24,10 @@ class MQTTRequest:
     def get_message(self, remote_access_token):
         date = datetime.utcnow()
         date_str = date.strftime(PSA_DATE_FORMAT)
-        data = {"access_token": remote_access_token, "customer_id": self.customer_id,
+        self.data = {"access_token": remote_access_token, "customer_id": self.customer_id,
                 "correlation_id": self.__gen_correlation_id(date), "req_date": date_str, "vin": self.vin,
                 "req_parameters": self.req_parameters}
-        return data
+        return self.data
 
     def is_expired(self):
         return self.date < datetime.now() - timedelta(seconds=self.TIME_BEFORE_EXPIRATION)
@@ -36,4 +37,7 @@ class MQTTRequest:
         date_str = date.strftime(PSA_CORRELATION_DATE_FORMAT)[:-3]
         uuid_str = str(uuid4()).replace("-", "")
         correlation_id = uuid_str + date_str
-        return correlation_id
\ No newline at end of file
+        return correlation_id
+
+    def __str__(self):
+        return "topic: " + self.topic + ": " + str(self.data)