rest - How to pass a map as query parameter

Question

I'm using labstack Echo (v4.1.11) go framework to create a REST API.

How do we/can we pass map query param in the URL? I tried adding the following struct for the request body

PaginationRequest struct {
    Page   int64             `query:"page"`
    Limit  int64             `query:"limit"`
    Filter map[string]string `query:"filter"`
}

and hoping I could got this url http://host/endpoint?page=1&limit=10&filter[status]=1&filter[user_id]=12 to work (read the filter["status"] and filter["user_id"]

But when I tried binding the incoming request to PaginationRequest it only read the page and limit parameter and filter = nil

I tried debug it into the echo/bind.go the Bind function in reading the QueryParam actually read filter[status] as plain string "filter[status]" as key.

Is there anyway we can pass the map to the url query param? or we really have to be specific in here?