How to use payload in Postman

I have 2 independent systems one is in house and other one is third party. When particular status update happens on in house system it will be notified to third party system via API.
Once notified then status of corresponding application on third party system gets freeze.

I need to create new application on third party system while running API automation suite next time. Is there any option to create application on third party system using payload or can payload will help me in this scenario? Third party system don’t have any API for application creation.