curl --request GET \
  --url http://localhost:8080/cabinet/admin/broadcasts/{broadcast_id}

{
  "id": 123,
  "target_type": "<string>",
  "has_media": true,
  "total_count": 123,
  "sent_count": 123,
  "failed_count": 123,
  "status": "<string>",
  "created_at": "2023-11-07T05:31:56Z",
  "message_text": "<string>",
  "media_type": "<string>",
  "media_file_id": "<string>",
  "media_caption": "<string>",
  "blocked_count": 0,
  "admin_id": 123,
  "admin_name": "<string>",
  "completed_at": "2023-11-07T05:31:56Z",
  "progress_percent": 0,
  "channel": "telegram",
  "email_subject": "<string>",
  "email_html_content": "<string>"
}