Save intermittent task state

Is it possible to save the intermittent state of an execution form before submitting the task?

Variable state?
Persisted by the engine?
This call would do it.

No, we want to save the intermediate state of the data filled in a task form like below (in our case we have a custom Angular Component) - is this possible? For ex: If I click Save the task does not get completed but I want save the details filled by user as part of the task.