Derivatives Response Example

{
    "query": {
        "exchange": "okex",
        "instrument_class": "future",
        "instrument": "ethusd200703",
        "data_version": "v1",
        "commodity": "instrument_metrics",
        "request_time": "2020-07-01T15:33:17.738Z"
    },
    "time": "2020-07-01T15:33:17.748Z",
    "timestamp": 1593617597748,
    "data": {
        "24h_volume": "1537502",
        "ask": "229.154",
        "bid": "229.153",
        "index_price": "228.93861032",
        "mark_price": "229.046",
        "open_interest": "890327",
        "expiry": "1593734400000",
        "price": "229.07"
    },
    "result": "success",
    "access": {
        "access_range": {
            "start_timestamp": null,
            "end_timestamp": null
        },
        "data_range": {
            "start_timestamp": null,
            "end_timestamp": null
        }
    }
}