I've got the same issue. CURL-example from documentation doesn't work with payload -d ‘{”activeSpeaker”:”The name of the active speaker”}’. After wrapping payload in "aps" everything works fine: curl -v \ --data '{"aps":{"message_id": 1, "author_name": "NaMe"}}' \ --header "apns-topic: X.voip-ptt" \ --header "apns-push-type: pushtotalk" \ --header "apns-priority: 10" \ --header "apns-expiration: 0" \