Allowing users to Update an Item Based on Relationship?

Questions and Answers Strapi Backend
1
System Information
  • Strapi Version: v3.6.8
  • Operating System:
  • Database:
  • Node Version: v14.17.0
  • NPM Version:
  • Yarn Version:

Hi all! Bit of a Strapi newbie, but I’m hoping someone can point me in the right direction to do a little learning. I’m setting up a site that has two major parts:

  • Users (via the USERS & PERMISSIONS PLUGIN)
  • 100 premade items (basically JSON objects)

I’ve figured out how to allow only authenticated users to Update the Items (via axios and http://localhost:1337/ITEM/:id), but can’t discern the best way to structure Relationships/Permissions so that a given user can only Update Items related to them.

Any advice? I’ve always been more of a front-ender, so I’ve got code experience, but databases and permissions are unfamiliar territory.

Thank you!