We are in the process of determining whether the Moodle push notifications conform with our data protection and privacy laws. We are using the AirNotifier service run by Moodle Pty in Ireland. We are now trying to find out what exact payloads are sent to the AirNotifier for the notification as this content decides whether we're allowed to use the push notifications.
I already found the example which is mentioned in the documentation here:
What I'm unable to find is a precise documentation of what Moodle content and user data is sent to the AirNotifier service and therefor to GCM/APNS.
I suspect that the relevant variable in the code is the $eventdata  in message_output_airnotifier.php.
What would be the easiest way to find the exact payload sent?