curl --location "$BASE_URL/decision_gateway" \
  --header "$AUTH_HEADER" \
  --header "Content-Type: application/json" \
  --data '{
    "merchantId": "merchant_demo",
    "eligibleGatewayList": ["stripe", "adyen"],
    "rankingAlgorithm": "SR_BASED_ROUTING",
    "paymentInfo": {
      "paymentId": "legacy_001",
      "amount": 1000,
      "currency": "USD",
      "paymentType": "ORDER_PAYMENT",
      "paymentMethodType": "CARD",
      "paymentMethod": "CREDIT"
    }
  }'