How to build a nested array of objects without duplicates in javascript

My requirement is, if I select a single category for the subscription on my client side, then I am sending that category details related to that category, and storing those in my backend with some id's and then pushing back to the client side to show those categories in one section to my user. So I will get an array of like below which is coming from my backend DBMy requirement is, if I select a single categor