{
  "event": "hard_bounce",
  "msg": {
    "ts": 1365109999,
    "subject": "This an example webhook message",
    "email": "example.webhook@mandrillapp.com",
    "sender": "example.sender@mandrillapp.com",
    "tags": [
      "webhook-example"
    ],
    "state": "bounced",
    "metadata": {
      "user_id": 111
    },
    "_id": "exampleaaaaaaaaaaaaaaaaaaaaaaaaa2",
    "_version": "exampleaaaaaaaaaaaaaaa",
    "bounce_description": "bad_mailbox",
    "bgtools_code": 10,
    "diag": "smtp;550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces."
  },
  "_id": "id2",
  "ts": 1384954004
}