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

{
  "channel": "DATA",
  "topic": "market.SSI",
  "data": {
    "s": "SSI",
    "b": "HOSE",
    "t": "2026/07/29",
    "ce": "48.50",
    "fl": "42.10",
    "ref": "45.30"
  }
}

{
  "channel": "DATA",
  "topic": "market.SSI",
  "data": {
    "b": "HOSE",
    "t": "2026/07/29 09:00:00",
    "f": "ATO"
  }
}