Accessing Subform Data using getRecordByID

Accessing Subform Data using getRecordByID

I am getting data from Zoho Creator using deluge zoho.creator.getRecordByID task, from another application.

The report contains a subform, and that subform is in the detail view of the report. 

I do not appear to have any subform data in the JSON response, does anyone know how to access and update the subform data using the task above?

Thanks