{
  "action": "subscribe",
  "channels": [
    {
      "name": "security_definition.G1.json",
      "symbols": [
        "HPG"
      ]
    }
  ]
}

{
  "T": "sd",
  "marketId": "DVX",
  "boardId": "G1",
  "isin": "VN41I1G20009",
  "symbol": "41I1G2000",
  "productGrpId": "FIO",
  "securityGroupId": "FU",
  "basicPrice": 2066.6,
  "ceilingPrice": 2211.2,
  "floorPrice": 1922,
  "openInterestQuantity": 24473,
  "securityStatus": "NO_HALT",
  "symbolAdminStatusCode": "NRM",
  "symbolTradingMethodStatusCode": "NRM",
  "symbolTradingSanctionStatusCode": "NRM",
  "listingDate": 20260223,
  "finalTradeDate": 20260416,
  "time": {
    "Seconds": 1779757279,
    "Nanos": 101000000
  }
}