正则获取匹配的多个结果中的第N个，或者说获取匹配的最后一个结果

[多梦]

{"id":35422632, "bucket":"hbimg", "type":"image/jpeg", "width":50, "height":50},{"id":35422639, "bucket":"hbimg", "type":"image/jpeg", "width":50, "height":50},{"id":35422646, "bucket":"hbimg", "type":"image/jpeg", "width":50, "height":50},{"id":35422699, "bucket":"hbimg", "type":"image/jpeg", "width":50, "height":50}

像这样的数据中想匹配最后一个ID，如上例子中匹配到的ID应该为35422699

不懂正则的小白求可用代码