Enable Playbooks for Custom Objects

This is exactly the feature I am looking for! We have Applications (a custom object) that are associated to Contacts.

Contacts can have multiple Applications. We are looking to use playbooks to store Application information that is asked during a call using a playbook.

We cannot save the information to a contact, as one contact can have different information for different Applications.

Any workaround for updating a record property on a custom object while using playbooks?