{
  "ok": true,
  "result": {
    "@type": "blocks.outMsgQueueSizes",
    "shards": [
      {
        "@type": "blocks.outMsgQueueSize",
        "id": {
          "@type": "ton.blockIdExt",
          "workchain": 123,
          "shard": "<string>",
          "seqno": 123,
          "root_hash": "<string>",
          "file_hash": "<string>"
        },
        "size": 123
      }
    ],
    "ext_msg_queue_size_limit": 123
  }
}