curl --request GET \
  --url https://api.example.com/api/v1/staking/orders

{
  "code": 0,
  "msg": "ok",
  "data": {
    "items": [
      {
        "orderId": "stk_20260511_0001",
        "productId": "base_usdc_nexfi_vault",
        "walletAddress": "0xabc1230000000000000000000000000000000000",
        "orderType": "subscribe",
        "status": "confirmed",
        "txHash": "0x123",
        "updatedAt": "2026-05-11T10:00:00.000Z"
      }
    ]
  }
}