Sending values.

data = {
                "api_key": self.api_key,
                "events": [
                    {
                        "event_type": "your_valid_event_type",
                        "user_id": user_id,
                        "message": message,
                        "post_id": post_id,
                    }
                ]
            }

If I send such a request to the api, will all the values be reached? I'm asking because in my case only the user_id reached.