Itunes.Song represents a song-based search result from iTunes.

defstruct artistId: nil, artistName: nil, artistViewUrl: nil, artworkUrl100: nil, artworkUrl30: nil, artworkUrl60: nil, collectionCensoredName: nil, collectionExplicitness: nil, collectionId: nil, collectionName: nil, collectionPrice: nil, collectionViewUrl: nil, country: nil, currency: nil, discCount: nil, discNumber: nil, isStreamable: nil, kind: nil, previewUrl: nil, primaryGenreName: nil, releaseDate: nil, trackCensoredName: nil, trackCount: nil, trackExplicitness: nil, trackId: nil, trackName: nil, trackNumber: nil, trackPrice: nil, trackTimeMillis: nil, trackViewUrl: nil, wrapperType: nil