Sign API request using Postman pre-request scripts

When we are about to test a dynamic API request via Postman and realize that we need to pass a freshly generated signature in the headers, what do we generally do? For each request, we generate the signature using server-side code and copy-paste it in the headers. Sounds like a tedious job, doesn’t it? We faced a similar situation in our application where we had to pass a signature in the headers while testing an API. The signature was generated by encoding all the request parameters using the user's secret key. If any of the request parameters changed, we