{
  "symbol": "btcinr",
  "side": "buy",
  "type": "limit",
  "quantity": "0.001",
  "price": "3750000.0",
  "clientOrderId": "my_order_123",
  "recvWindow": 5000,
  "timestamp": 1641463132000,
  "signature": "hmac_sha256_signature_here"
}