Returns a dictionary with all song information.
        Use the :meth:`from_export` method to recreate the
        :class:`Song` object.

def export(self):
        """
        Returns a dictionary with all song information.
        Use the :meth:`from_export` method to recreate the
        :class:`Song` object.
        """
        return {'id': self.id, 'name': self.name, 'artist': self._artist_name,
                'artist_id': self._artist_id, 'album': self._album_name,
                'album_id': self._album_id, 'track': self.track,
                'duration': self.duration, 'popularity': self.popularity,
                'cover': self._cover_url}