old_contents: import Api from '@/services/Api'
  
  export default {
    index () {
      return Api().get('songs')
    },
    post (song) {
      return Api().post('song', song)
    },
    show (songId) {
      return Api().get(`song/${songId}`)
    }
  }
  
new_contents: import Api from '@/services/Api'
  
  export default {
    index () {
      return Api().get('songs')
    },
    post (song) {
      return Api().post('song', song)
    },
    show (songId) {
      return Api().get(`song/${songId}`)
    },
    put (song) {
      console.log('Song', song)
      return Api().put(`song/edit`, song)
    }
  }
  
subject: add put method to SongsService