HSDL - How to change Allocated Checklists Tasks Assignee

Summary:

Our purpose is to change the "Assigned to" value into the journeys via HSDL

Content (please ensure you mask any confidential information):

We would like to change the Assigned to value into Journeys via HSDL,

These are the attributes we put into the template

We did different tests, selecting one by one the last attributes, but no one of them actually changed the Assigned to, even into the successful updates. How can we do this?

Thanks

Regards, Giuseppe