{"e":"bookTicker",// event type"u":400900217,// order book updateId"E":1568014460893,// event time"T":1568014460891,// transaction time"s":"BNBUSDT",// symbol"b":"25.35190000",// best bid price"B":"31.21000000",// best bid qty"a":"25.36520000",// best ask price"A":"40.66000000"// best ask qty}