{
  "method": "POST",
  "body": {
    "object": "page",
    "entry": [{
      "messaging": [
        {
          "sender":{
            "id":"USER_ID"
          },
          "recipient":{
            "id":"PAGE_ID"
          },
          "timestamp":1458692752478,
          "message":{
            "mid":"mid.1457764197618:41d102a3e1ae206a38",
            "seq":73,
            "text":"hello, world!"
          }
        }
      ]
    }]
  }
}

Add facebook message event for testing
Add facebook message event for testing

Useful for testing:
serverless webpack invoke -f facebookMessenger -p test/data/event-fbmessage.json
