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http://music.163.com/api/song/detail/?id=36990266&ids=%5B36990266%5D&csrf_token=
把ID换掉，输入到浏览器地址栏
http://m2.music.126.net/OjgrxW7zsP6QzPE9baQULA==/1415071473003094.mp3
找到与这个类似的就是了