How can I extract [object Object] that I received from my request.query

I am trying to send a object to my backend through a object, but when I try to extract that I am getting [object Object].

These are the filters:
public filters: { [key: string]: any } = {};

And I add a key with a object as value to it as filter:
this.filters[key] = {my object};

Now in the backend when I try to get the object like this:

export async function myFunction(
    request: Request,
    response: Response,
) {
    const chartFilters = request.query?.chartFilters;
}

the chartFilters will display [object Object].

I’ve tried lots of things but kept getting errors.

Hope someone can help me.