Choose UAT environment in the top right corner, the api key is pre-configured.
2.
Go to the API, click drop down button and find the pre-set test case, click "send".
3.
Go to console, output of every step of signing calculation is printed.
4.
Go to "pre-process" step, click on the sign-v2 script and check the content for reference of the signature implementation. It is written in javascript and is compatible with postman