{
  "new_messages": [
    {
      "id": 30,
      "content": "Second visitor message: any update?",
      "inbox_id": 1,
      "conversation_id": 5,
      "message_type": 0,
      "content_type": "text",
      "status": "sent",
      "content_attributes": {
        "in_reply_to": null
      },
      "created_at": 1792842487,
      "private": false,
      "source_id": null,
      "sender": {
        "additional_attributes": {
          "company_name": "<redacted>"
        },
        "custom_attributes": {},
        "email": "lab-visitor+1792842468016@example.com",
        "id": 19,
        "identifier": null,
        "name": "Lab Visitor",
        "phone_number": null,
        "thumbnail": "",
        "blocked": false,
        "contact_type": "lead",
        "type": "contact",
        "company_id": 1
      }
    }
  ],
  "total_before": 5,
  "total_after": 6
}