{
    "type": "message",
    "subtype": "message_changed",
    "hidden": true,
    "channel": "C2147483705",
    "ts": "1355517529.000005",
    "message": {
      "type": "message",
      "user": "U2147483697",
      "text": "Hello world",
      "ts": "1355517519.000005",
      "edited": {
        "user": "U2147483697",
        "ts": "12341234"
      }
    },

    "_server": "test.slack.com"
}