{
  "e": "markPriceUpdate", // Event type
  "E": 1562305380000, // Event time
  "s": "BTCUSDT", // Symbol
  "p": "11794.15000000", // Mark price
  "i": "11784.62659091", // Index price
  "P": "11784.25641265", // Estimated Settle Price, only useful in the last hour before the settlement starts
  "r": "0.00038167", // Funding rate
  "T": 1562306400000 // Next funding time
}

{
  "e": "kline", // Event type
  "E": 1638747660000, // Event time
  "s": "BTCUSDT", // Symbol
  "k": {
    "t": 1638747660000, // Kline start time
    "T": 1638747719999, // Kline close time
    "s": "BTCUSDT", // Symbol
    "i": "1m", // Interval
    "f": 100, // First trade ID
    "L": 200, // Last trade ID
    "o": "0.0010", // Open price
    "c": "0.0020", // Close price
    "h": "0.0025", // High price
    "l": "0.0015", // Low price
    "v": "1000", // Base asset volume
    "n": 100, // Number of trades
    "x": false, // Is this kline closed?
    "q": "1.0000", // Quote asset volume
    "V": "500", // Taker buy base asset volume
    "Q": "0.500", // Taker buy quote asset volume
    "B": "123456" // Ignore
  }
}