{
  "action": "subscribe",
  "channels": [
    {
      "name": "market_index_influence.VN30.1.json",
      "symbols": []
    }
  ]
}

{
  "T": "ii",
  "index_name": "VN30",
  "data": [
    {
      "time": "2026-09-10 09:15:00.000",
      "symbol": "VCB",
      "influence": 2.34,
      "influenceRatio": 0.28,
      "proportion": 0.09,
      "changeRatio": 1.2,
      "changeValue": 1.5,
      "price": 95500,
      "grossTradeAmount": 1250000000,
      "totalVolumeTraded": 13000
    }
  ]
}