curl --location --request POST '/gateway/base/biz' \
--header 'method: pay' \
--header 'signType: SHA512' \
--header 'serviceName: api.pay' \
--header 'mchId: 1416010331032883200' \
--header 'timestamp: 1631671670' \
--header 'sign: 32554324534545432543' \
--header 'Content-Type: application/json' \
--data-raw '{
"amount": "10",
"callbackUrl": "https://b3b5-117-42-55-134.jp.ngrok.io/india-merchant/core/callback",
"currency": "NGN",
"email": "932521@gmail.com",
"firstname": "John",
"lastname": "Smith",
"mchOrderId": "1777270252",
"paymentType": "",
"paymentMethod": "",
"cardNumber": "0738222112",
"phone": "8095659738",
"productinfo": "your pro simple desc",
}'