Optionalaccepted_Id of the subscribed app.
Optionalcorrelation_The value provided in field correlation_id of a send message request.
Optionalevent_Timestamp of the event as provided by the underlying channels.
Optionalmessage_Context-dependent metadata. Refer to specific callback's documentation for exact information provided.
The project ID of the app which has subscribed for the callback.
Optionalrecord_Name of the trigger responsible for this event.
Timestamp marking when the channel callback was accepted/received by the Conversation API.