fbmessenger-api-0.1.0.0: test-files/wsPostbackRequest.json

{
  "object":"page",
  "entry":[
    {
      "id":111111,
      "time":1458692752478,
      "messaging":[
        {
          "sender":{
            "id":"USER_ID"
          },
          "recipient":{
            "id":"PAGE_ID"
          },
          "timestamp":1458692752478,
          "postback":{
            "payload":"USER_DEFINED_PAYLOAD"
          }
        }
      ]
    }
  ]
}