var stuff = JObject.Parse("{ 'Name': 'Jon Smith', 'Address': { 'City': 'New York', 'State': 'NY' }, 'Age': 42 }");

            ParameterExpression parameterExpression = Expression.Parameter(typeof(JObject), "g");
            var indexexpr = Expression.MakeIndex(parameterExpression, typeof(JObject).GetProperty("Item", new[] { typeof(string) }),
                new[] { Expression.Constant("Address") });
            var secondlevel = Expression.MakeIndex(indexexpr, typeof(JToken).GetProperty("Item", new[] { typeof(string) }),
               new[] { Expression.Constant("State") });

            var conversion = Expression.Convert(secondlevel, typeof(string));


            var result = Expression.Equal(conversion, Expression.Constant("NY"));

            var fun =Expression.Lambda<Func<JObject, bool>>(result, new[] {parameterExpression}).Compile();
            var istrue = fun(stuff);