{
  "eventId": "evt_7890123456abcdef",
  "instanceId": "ins_ABCdefGHIjk",
  "receivedAt": "2025-05-19T00:51:44.816Z",
  "eventType": "group",
  "eventData": {
    "id": "1234567890-1234567890@g.us",
    "sender": {
      "id": "1234567890@s.whatsapp.net",
      "lid": "12345678901234@lid",
      "phone": "1234567890",
      "isMe": false
    },
    "description": {
      "topic": "New Group Description"
    },
    "timestamp": "2025-05-19T00:51:44.816Z"
  }
}