How to perform REST API call in the Back ground

Summary:

We want to know is there a way to perform REST API call in the back ground(invoking other action) so that the sales user will not be asked to wait (in UI) until the operation is complete. Problem Statement : We are trying to perform some operations (updating prior versions of the quotes) on click of approve action but it is taking time to complete the action and it is not returning the cursor to the user until the action is complete. At this time the user is stuck in that quote & not able to perform other operations on