How can we assign a task to particular identity by programming

Hi, I want to assign a task(i.e Review of Document, which is related to part(Part Document Relationship)) to the some team identity when I saved a Part. How can I achieve this by programming(javascript)? till now, I am able to get the Team ID, and Role and Identity, now I want to create a task for that Role. Thanks in advance, Regards, Maddy.