Changed Entity.UrlEncodedKey from [DataMember] to [NotMapped].  It was getting unneccessarily included when Serialized (into JSON).  Any since it calls an encryption method, it was causing Serialization to take almost twice as long, and increased the serialized size of things by 10% or so.  This should make the Checkin Config UI (and other things that so a bunch of serialization) much faster