neteasecloudmusicapi/module/playlist_tracks.js

// 收藏单曲到歌单 从歌单删除歌曲

module.exports = (query, request) => {
  const data = {
    op: query.op, // del,add
    pid: query.pid, // 歌单id
    trackIds: '[' + query.tracks + ']' // 歌曲id
  }
  return request(
    'POST', `https://music.163.com/weapi/playlist/manipulate/tracks`, data,
    {crypto: 'weapi', cookie: query.cookie, proxy: query.proxy}
  )
}