User Story
The playlists need to be saved in the json file for later use of the app.
The playlists will be save in the format of a dictionary so that the keys are playlists name and values are the position in the playlist.
example:
[ { "id": "1234", "name": "test", "playlists": { "playlist1": 2 } }, { "id": "4567", "name": "test2", "playlists": { "playlist1": 1, "playlist2": 5 } } ]