Update "Participant Request" field with "assignee" field updated in a linked issue.

[Celeste D'Alessandro]

I need support in the following scenario:

- Jira Server.

- Jira Software and Jira Service Desk

- Script Runner.

JSD Project automatically creates a linked issue in a software project when it is transitioned to "DERIVED".

Need: to Add as a "Participant Request" the "assignee" from the linked issue when the assignment is made. (Assignee field from Jira Software project is updated).

Thanks in advance!