Message received

{
  "id": "<string>",
  "session": "<string>",
  "timestamp": "<string>",
  "event": "message.received",
  "payload": {
    "id": "<string>",
    "conversation": {
      "id": "<string>",
      "phoneNumber": "<string>",
      "username": "<string>",
      "sender": {
        "id": "<string>",
        "phoneNumber": "<string>",
        "username": "<string>"
      }
    },
    "fromMe": true,
    "timestamp": 123,
    "pushName": "<string>",
    "isGroup": true,
    "text": "<string>",
    "caption": "<string>",
    "mimeType": "<string>",
    "ptt": true,
    "filename": "<string>",
    "latitude": 123,
    "longitude": 123,
    "displayName": "<string>",
    "title": "<string>",
    "reaction": "<string>",
    "reactionTo": "<string>",
    "revokedId": "<string>",
    "media": "<string>",
    "mediaUrl": "<string>",
    "edited": true,
    "pollOptions": [
      {
        "name": "<string>",
        "hash": "<string>"
      }
    ],
    "unavailable": true,
    "unavailableReason": "<string>"
  }
}