Hi @sharma.prabhu97. I have created a node js sample to show minimal example of requesting an authentication token and perform a DSS operation (ric search). You can use it as a starting template.
@sharma.prabhu97, I'm sorry, we currently do not have any samples in node js.
The Postman collection and the associated REST API Tutorials series would be a good starting point for you, as they illustrates the raw HTTP requests and responses. The first tutorial illustrates retrieving a token, and then using it to submit a request.
Hope this helps