Merchandising product via Store Links

We operate an online marketplace, with different stores/showrooms online. I have been unable to promote items based on each store/showroom. Pls, note that I can merchandise category pages effectively.
I tried promoting a store by creating a new rule and adding a query parameter consisting of the store with the filter code below.

Items promoted reflected on the store front end but disrupted the category pages.

Kindly help with the method/process of promoting items based on the store level.

Hi @temilade.fashae, There is an error in your json. It should be
{"filters": ""}