{
  "id": "evt_8192a3b4c5d6e7f8091a2b3c4d5e6f70",
  "field": "messages",
  "createdAt": "2025-06-08T20:59:44.512Z",
  "pipes": {
    "appId": "app_abc123",
    "poolNumberId": "pn_abc123",
    "media": {}
  },
  "whatsapp": {
    "messaging_product": "whatsapp",
    "metadata": {
      "display_phone_number": "15550001111",
      "phone_number_id": "106540352242922"
    },
    "messages": [
      {
        "from": "16505559999",
        "id": "wamid.HBgLMTY1MDU1NTk5OTkVAgASGBQ3RDBCRTM2NDFGOENBMUJDNDUA",
        "timestamp": "1749416383",
        "type": "system",
        "system": {
          "body": "User A changed from 16505551234 to 16505559999",
          "wa_id": "16505559999",
          "user_id": "US.99999999999999999999",
          "previous_user_id": "US.13491208655302741918",
          "type": "user_changed_number"
        }
      }
    ]
  }
}