{
  "topic": "all_spot_mids",
  "mids": [
    {
      "market_addr": "0x26f1ddaa436a7b134d5c872c032eaa66653b673bca2bb1539642094d6b113c50",
      "asset_type": "spot",
      "mid": 4.5,
      "last_trade_price": 4.51,
      "transaction_unix_ms": 1699564800000
    }
  ]
}