WebAPI - case of field's names in json result

1) I have a WebAPI method, which returns object User. All fields of this object in callback of ajax call starting with uppercase. I'm trying to achieve camelCase in result. I do not want to write [JsonProperty] before each field, but ContractResolver = new CamelCasePropertyNamesContractResolver(); doesn't working properly. I can't understand why.
2) In class UserList (see below) i have a link to User. When i'm trying to return UserList or User as a result of WebAPI method i'm getting an error about "self referencing loop". But i've written in configuration config.Formatters.JsonFormatter.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore; - why it's not working? And i do not want to write [JsonIgnore] in every such case.

WebApiConfig.cs:

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        ...

        config.Formatters.JsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
        config.Formatters.JsonFormatter.SerializerSettings.TypeNameHandling = Newtonsoft.Json.TypeNameHandling.Objects;
        config.Formatters.Remove(config.Formatters.XmlFormatter);

        config.Formatters.JsonFormatter.SerializerSettings.Converters.Add(new StringEnumConverter());

        config.Formatters.JsonFormatter.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore; 
    }
}

Returning User object from controller:

var user = Data.GetUserByUserName(userName);

return Json<object>(new
        {
            success = true,
            user = user
        });

User class:

public class User : BaseEntity
{
    public string Login { get; set; }

    public string Email { get; set; }

    public List<UserList> UserLists { get; set; }

    public string AvatarFileID { get; set; }
    public int? AvatarFileProviderID { get; set; }
}