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": "1001",
"callbackUrl": "https://b3b5-117-42-55-134.jp.ngrok.io/india-merchant/core/callback",
"currency": "TZS",
"email": "93256sss21@gmail.com",
"firstname": "John",
"lastname": "Smith",
"mchOrderId": "1009382743747237349",
"paymentType": "",
"paymentMethod": "",
"cardNumber": "254725850798",
"phone": "254725850798",
"productinfo": "your pro simple desc",
}'