message-attachment-audio.json

{
  "headers": {
    "host": "localhost",
    "accept": "*/*",
    "accept-encoding": "deflate, gzip",
    "content-type": "application/json"
  },
  "body": {
    "object": "page",
    "entry": [{
      "id": "514061682115264",
      "time": 1469431745244,
      "messaging": [{
        "sender": {
          "id": "10157033896470455"
        },
        "recipient": {
          "id": "514061682115264"
        },
        "timestamp": 1469431745203,
        "message": {
          "mid": "mid.1469431744913:f67f0fa3b14a987b03",
          "seq": 2247,
          "attachments": [{
            "type": "audio",
            "payload": {
              "url": "https://cdn.fbsbx.com/v/t59.3654-21/13841407_10157298310850455_866757824_n.aac/audioclip-1469431744746-9754.aac?oh=05ffa0fe133d7c2ea46764f7bde172f4&oe=57978D3A"
            }
          }]
        }
      }]
    }]
  },

  "+expected":
  {
    "plan": 14,
    "entry": [{
      "messaging": [{
        "message": {
          "type": "attachment",
          "user": {
            "id": "10157033896470455"
          }
        }
      }]
    }]
  }
}