{
    "api_key": "YOUR_API_KEY",
    "@type": "sendMessage",
    "chat_id": "1234567",
    "disable_notification": true,
    "input_message_content": {
      "@type": "inputMessageText",
      "disable_web_page_preview": false,
      "text": {
        "@type": "formattedText",
        "text": "Hello world"
      }
    }
  }