curl --request GET \
  --url https://api.perpo.trade/v1/client/margin_modes \
  --header 'perpo-account-id: <perpo-account-id>' \
  --header 'perpo-key: <perpo-key>' \
  --header 'perpo-signature: <perpo-signature>' \
  --header 'perpo-timestamp: <perpo-timestamp>'

{
  "success": true,
  "data": {
    "rows": [
      {
        "symbol": "PERP_BTC_USDC",
        "default_margin_mode": "CROSS"
      }
    ]
  },
  "timestamp": 1702989203989
}