{
  "message": "Webhook created!",
  "data": {
    "id": 42,
    "target_url": "https://example.com/webhooks/paubox",
    "events": [
      "inbound_mail_received",
      "api_mail_log_delivered"
    ],
    "active": true,
    "signing_key": "whsec_abc123",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}

{
  "errors": [
    {
      "code": 123,
      "title": "<string>",
      "details": "<string>"
    }
  ]
}