Adding specific parameter to url with no typical name

Question

I'm setting url parameters like that:

news?page={page}&size={size}&dataEnd[before]={dateEndBefore}

in this way:

final Map<String, String> uriVariables = new HashMap<>();
uriVariables.put("page", String.valueOf(page));
uriVariables.put("size", String.valueOf(size));

return this.restClientWrapper.doGet(
            NEWS, this.getBearerToken(), new ParameterizedTypeReference<>() {
            }, uriVariables);

but, how can I set dataEnd[before] parameter for my get call?