API : /v1/billing/{billingKey}
{"billingKey":"lQaN2DNMYwluk7ByWc6u4oHA1yR6iK7WVXPeKLyj3VQ=","amount":300000,"customerKey":"64PlX61687782887","orderId":"q8E2zE_PLAN_BASIC_1687785274","orderName":"BASIC"}
API : /v1/billing/{billingKey}
{"billingKey":"lQaN2DNMYwluk7ByWc6u4oHA1yR6iK7WVXPeKLyj3VQ=","amount":300000,"customerKey":"64PlX61687782887","orderId":"q8E2zE_PLAN_BASIC_1687785274","orderName":"BASIC"}