我想获取用户联系人的个人资料照片。我正在使用范围为“wl.basic”的实时sdk，但我只得到以下内容，
{"id":"contact.6c9151b7000000000000000000000000", "first_name":"Jaiganesh alc", "last_name":null, "name":"Jaiganesh alc", "is_friend":false, "is_favorite":true, "user_id":null, "email_hashes":[], "updated_time":"2013-11-18T12:37:22+0000", "emails":{"preferred":null, "account":null, "personal":null, "business":null, "other":null}}
{"id":"contact.48a6e7c1000000000000000000000000", "first_name":"John", "last_name":"Smith", "name":"John Smith", "is_friend":false, "is_favorite":false, "user_id":null, "email_hashes":["97c370d92fa77d98e7b20014a2ad3d1a67aef140ae0f885b51f951f59dd9f6f5"], "updated_time":"2014-02-25T10:39:12+0000", "emails":{"preferred":"sdj@hjgsf.com", "account":null, "personal":"sdj@hjgsf.com", "business":null, "other":null}}
联系人的个人资料图片如何？