JWT & PubSub on the Developer Rig

Extensions
3

I can now send a pubsub message for an extension but am getting a 204 error (no content), where is the content supposed to go?? I’m using the example given and am getting the error.

                var dataToSend = {"content_type":"application/json", "message":"{\"foo\":\"bar\"}", "targets":["broadcast"]};
                //dataToSend = JSON.stringify(dataToSend);
                $.ajax({
                    url: 'https://api.twitch.tv/extensions/message/178080165',
                    headers: {
                        'Authorization':'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE1ODkzNDg5NDcsInVzZXJfaWQiOiIxNzgwODAxNjUiLCJyb2xlIjoiZXh0ZXJuYWwiLCJjaGFubmVsX2lkIjoiMTc4MDgwMTY1IiwicHVic3ViX3Blcm1zIjp7InNlbmQiOlsiKiJdfX0.GTUWnBKwtei6-j2OYh6R8Fj59m8bDkUmWbxQVTeDs4Y',
                        'Client-Id':'g39equtxkqd9z7s9qvj6cshka1jgu8'
                    },
                    method: 'POST',
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    data: dataToSend,
                    success: function(data){
                    console.log(data);
                    }
                });

This is what I’m using.