{
  "jsonrpc": "2.0",
  "method": "subscription",
  "params": {
    "subscription": "0x6423...",
    "channel": "user_funding_fee",
    "filters": {
      "address": "0xAccc..."
    },
    "result": {
      "symbol": "BTC",
      "fundingFee": "-1.2345",
      "fundingAsset": "USDT",
      "fundingTime": 1710000000000,
      "positionSize": "0.50"
    }
  }
}