{
  "method": "SUBSCRIBE",
  "channel": "DATA",
  "topics": [
    "trade.SSI",
    "quote.ACB-SSI-GVR-KDH",
    "room.vn30",
    "put.hose",
    "oddlot.SSI",
    "market.hose"
  ]
}

{
  "method": "UNSUBSCRIBE",
  "channel": "DATA",
  "topics": [
    "trade.SSI",
    "quote.SSI"
  ]
}

{
  "channel": "DATA",
  "topic": "trade.SSI@tick",
  "data": {
    "s": "SSI",
    "t": "2026/07/29 09:15:32",
    "p": "45.50",
    "q": "1000",
    "a": "45.35",
    "si": "B",
    "o": "45.00",
    "h": "45.80",
    "l": "44.90",
    "v": "1250000"
  }
}