parseChartPlaylist function
Parses a playlist from the charts data.
Implementation
JsonMap parseChartPlaylist(JsonMap data) {
  return {
    'title': nav(data, TITLE_TEXT),
    'playlistId': (nav(data, [...TITLE, ...NAVIGATION_BROWSE_ID]) as String)
        .substring(2),
    'thumbnails': nav(data, THUMBNAIL_RENDERER),
  };
}