{
  "id": 42,
  "jsonrpc": "2.0",
  "method": "public/subscribe",
  "params": {
    "channels": [
      "incremental_ticker.BTC-PERPETUAL"
    ]
  }
}

{
  "data": {
    "best_ask_amount": 100,
    "best_ask_price": 36443,
    "best_bid_amount": 5000,
    "best_bid_price": 36442.5,
    "current_funding": 0,
    "estimated_delivery_price": 36441.64,
    "funding_8h": 0.0000211,
    "index_price": 36441.64,
    "instrument_name": "BTC-PERPETUAL",
    "last_price": 36457.5,
    "mark_price": 36446.51,
    "max_price": 36991.72,
    "min_price": 35898.37,
    "open_interest": 502097590,
    "settlement_price": 36169.49,
    "state": "open",
    "stats": {
      "high": 36824.5,
      "low": 35213.5,
      "price_change": 0.7229,
      "volume": 7871.02139035,
      "volume_usd": 284061480
    },
    "timestamp": 1623060194301,
    "type": "snapshot"
  }
}