{
  "id": 2,
  "method": "balanceSpot_request",
  "params": [
    "ETH",
    "BTC"
  ]
}

{
  "id": 3,
  "method": "balanceSpot_subscribe",
  "params": [
    "USDT",
    "ETH"
  ]
}

{
  "id": 4,
  "method": "balanceSpot_unsubscribe",
  "params": []
}

{
  "id": 2,
  "result": {
    "ETH": {
      "available": "0",
      "freeze": "0"
    },
    "BTC": {
      "available": "0",
      "freeze": "0"
    }
  },
  "error": null
}

{
  "id": 3,
  "result": {
    "status": "success"
  },
  "error": null
}

{
  "id": null,
  "method": "balanceSpot_update",
  "params": [
    {
      "USDT": {
        "available": "100.1885",
        "freeze": "0"
      }
    }
  ]
}

{
  "id": 4,
  "result": {
    "status": "success"
  },
  "error": null
}