Issue title: the song name error
 Issue body: I have a song with long name "11111111111111". At first the name shows correctly, but after i switch different apps for many times, the name become 1e20.
 Comments: 
 Comment 0: I don't think I know how to fix this bug, but you may want to give your songs names which contain at least one letter.
{'source': 'GithubIssues', 'repo_name_with_owner': 'kabouzeid/Phonograph', 'issue_id': 771909258, 'repo_stars': 3047.0}