curl --request GET \
  --url https://api.orderly.org/v1/public/funding_rate/{symbol}

{
  "success": true,
  "timestamp": 1702989203989,
  "data": {
    "symbol": "PERP_ETH_USDC",
    "est_funding_rate": 0,
    "est_funding_rate_timestamp": 1683880020000,
    "last_funding_rate": 0.0001,
    "last_funding_rate_timestamp": 1683878400000,
    "next_funding_time": 1683907200000,
    "sum_unitary_funding": 521.367
  }
}