t() :: %Sptfy.Object.AudioFeature{
  acousticness: term(),
  analysis_url: term(),
  danceability: term(),
  duration_ms: term(),
  energy: term(),
  id: term(),
  instrumentalness: term(),
  key: term(),
  liveness: term(),
  loudness: term(),
  mode: term(),
  speechiness: term(),
  tempo: term(),
  time_signature: term(),
  track_href: term(),
  type: term(),
  uri: term(),
  valence: term()
}