SocialRatingManager causing custom WCF server to send back Bad Request

Question

I'm working on a custom WCF for SharePoint 2010 that I call through Javascript that grabs the ratings of all the users who rated a particular item. Since there is no way for a standard user to retrieve all ratings (outside of giving them Manage Social Data rights), I'm trying to do this part via elevated privledges. Of course, I can't use that in Javascript so that's why I have my custom web service. In any case, I've been messing around adding some code piece by piece because before when I put all my code in I couldn't figure out why I was getting a Bad Request sent back as the error thrown.

When I finally added code to get the SocialRatingManager to make a call (GetRating()) I got the bad request sent back to me. I can't for the life of me figure out why!

Below are code snippets, in case they help. Thanks for any help in advance. Let me know if I should provide anymore information.

WCF C#:

Interface:

 [ServiceContract]
    public interface ITestService
    {
        [OperationContract]
        [WebInvoke(Method = "GET", BodyStyle = WebMessageBodyStyle.Bare, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
        int SetVotes(string url, string listName);
    }

Class:

 public int SetVotes(string url, string listName)
        {
            int test = 60;

            SPSecurity.RunWithElevatedPrivileges(delegate()
            {
                using (SPSite site = new SPSite(url))
                {
                    using (SPWeb ElevatedWeb = site.OpenWeb())
                    {
                        var item = ElevatedWeb.Lists[listName].Items.GetItemById(GetItemID(url));
                        test = Convert.ToInt32(item["Votes"]);

                        var serviceContext = SPServiceContext.GetContext(site);
                        var uri = new Uri(url);
                        var ratingManager = new SocialRatingManager(serviceContext);
                        var test2 = ratingManager.GetRating(uri);
                    }
                }
            });

            return test;
        }

        private int GetItemID(string url) 
        {
            int index = url.IndexOf("?");
            if (index > 0)
                url = url.Substring(index).Remove(0, 1);

            var node = HttpUtility.ParseQueryString(url).Get("ID");

            return Convert.ToInt32(node);
        }

jQuery:

function CallService2(opts, $obj, serviceData, callBack) {
        
        $.ajax({
            type: "GET",
            url: opts.SetVotesUrl,
            data: { url: serviceData.url, listName: serviceData.listName },
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function (msg) {
                callBack(msg, opts, $obj);
            },
            error: function (XMLHttpRequest, textStatus, errorThrown) {
                alert(errorThrown);
            }
        });
    };