Click on the same Import button in the upper left corner.
Select the downloaded JSON file and import it.
Select the Environment:
In Postman, click on the environment dropdown near the top right of the screen and select “Coinbase Developer Platform Postman Environment”.
Or by using the Environments tab on the left bar - Make sure the correct environment is selected by checking the check mark to the
right of the environment name in Postman.
Set Up Variables:
Click the Environments tab under My Workspace on the left of the screen
Select the “Coinbase Developer Platform Postman Environment”.