Unity - Parse.com - Update data

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using Parse;
using System;
using System.Threading.Tasks;

public class Mao : MonoBehaviour
{

    // Use this for initialization
    void Start()
    {

        var query = new ParseQuery<ParseObject>("GameScore")
            .WhereEqualTo ("objectId", "GY5pnlDaOJ");

        query.FindAsync().ContinueWith(t =>
                                       {
            var tokens = t.Result;
            IEnumerator<ParseObject> enumerator = tokens.GetEnumerator();
            enumerator.MoveNext();
            var token = enumerator.Current;
            token["score"] = 2015;
            return token.SaveAsync();
        }).Unwrap().ContinueWith(t =>
                                 {
            // Everything is done!
            //Debug.Log("Token has been updated!");
        });


    }



}