Meta team replied to us via ticket:

The parameter "type": "call_permission_reply" can be ignored as this is part of some a feature that would be launched at a later point in time.

Currently there are no external available documents that I can share with you as the feature is not live yet.

However, I will notify the respective team to disable this in order to avoid confusion.

Thank you.

We are encountering the same issue.

Hello. We are encoutering the same issue. Can you please provide a documentation for this new type.

Hello. We are encoutering the same issue.