Change of balance

param

format: balance

eg: balance

push

{
    "ch": "balance",
    "data": {
        "a": "123",           // accountId
        "t": 1656043204763,   // time happened time
        "c": "btc",           // currency
        "b": "123",           // all spot balance
        "f": "11",            // frozen
        "z": "SPOT",          // bizType [SPOT]
        "s": "btc_usdt"       // symbol
    },
    "ts": 1656043204763
}