how to store array of objects as an attribute

department: [ { branch: "branchName", speciality: ["specialityName", "specialityName2"], }, ], storing this as an attribute

TL;DR

Developers want to store an array of objects as an attribute. They have a 'department' attribute with objects containing 'branch' and 'speciality' arrays. To store it as an attribute, wrap the department array within an object and save it.