To explore Sign API v2 using Postman, you must first import its configuration files into Postman.
Start Postman and, from the Import dialog, select Upload Files:
Select the collection and environment files that you downloaded earlier:
You should now be able to see 1 Collection and 1 Environment in the Postman workspace:
Select the Sign API v2 environment:
Now you have set up Postman to work with the API v2 environment.
To ensure that you are using the most up-to-date version of the production API, download the latest collection and environment files from the API v2 Quick Start page.