{
  "ok": true,
  "result": {
    "@type": "blocks.header",
    "id": {
      "@type": "ton.blockIdExt",
      "workchain": 123,
      "shard": "<string>",
      "seqno": 123,
      "root_hash": "<string>",
      "file_hash": "<string>"
    },
    "global_id": 123,
    "version": 123,
    "after_merge": true,
    "after_split": true,
    "before_split": true,
    "want_merge": true,
    "want_split": true,
    "validator_list_hash_short": 123,
    "catchain_seqno": 123,
    "min_ref_mc_seqno": 123,
    "is_key_block": true,
    "prev_key_block_seqno": 123,
    "start_lt": "<string>",
    "end_lt": "<string>",
    "gen_utime": 123,
    "prev_blocks": [
      {
        "@type": "ton.blockIdExt",
        "workchain": 123,
        "shard": "<string>",
        "seqno": 123,
        "root_hash": "<string>",
        "file_hash": "<string>"
      }
    ]
  }
}