Sisense prism cookie issue

Sisense instance creates prism sso cookie in server domain after successful so authentication using Jwt token. This cookie is available when making API calls to Sisense from client browser. Example. our Sisense instance is https://sisense.qa.xxx.com.  Domain for prism cookie is sisense.qa.xxx.com.    

Our application is deployed on app.qa.xxx.com. We plan to make Sisense API calls from server side which requires prism cookie to be passed from our client to our server which in turn makes call to sisense.  How can we configure so that prisma cookie should be created in qa.xxx.com in place of sisense.qa.xxx.com.

Please advise .

Thanks

Chander Ahuja