Output variable as business data when submitting form

Dear Bonita community,

I am beginning with lot of illusion to create diagrams and processes in Bonita Studio, but I am facing an issue I cannot solve when creating a form..

I want to achieve the following: Approval process that keeps visible the task submitter and the manager during the whole process

manager: ../API/identity/user/{{session.user_id}}?d=professional_data&d=manager_id

manager.manager_id

user: ../API/system/session/unusedId

user.user_name

If I substitute the "data:formInput..." with my variables, I see the values I want in the form, but when submitting, the values are not being stored.

How can I combine data:formInput with my variables to be stored like if they would be entered manually? Anyone has an idea?

Thanks in advance!