======================== unified (from filesystem) ========================
                                         'bitrate'  '258.452'
                                        'duration'  '420'
                                          'artist'  'Opeth'
                                     'text_people'  'M Akerfeldt'
                                         'release'  'Watershed'
                                           'title'  'Hex Omega'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-4', 'q-play-2', "
 "'q-chart-3', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['progressive death metal', 'metal', 'melodic death metal', 'death metal', "
 "'progressive metal']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'eid-metal-progressive'
                                             'bpm'  '140.044'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'PRIV:AverageLevel:{%\x00\x00'                      PRIV(owner='AverageLevel', data=b'{%\x00\x00')
'PRIV:PeakValue:¡\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xa1\x7f\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/Provider:A\x00M\x00G\x00\x00\x00'          PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x001\x003\x008\x004\x004\x000\x009\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x002\x001\x004\x000\x005\x001\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x001\x004\x003\x002\x001\x006\x008\x003\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x001\x003\x008\x004\x004\x000\x009\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x002\x001\x004\x000\x005\x001\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x001\x004\x003\x002\x001\x006\x008\x003\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:Áç½³.þ\x0fL¯i\x08Êp®¦Ò'  PRIV(owner='WM/WMCollectionGroupID', data=b'\xc1\xe7\xbd\xb3.\xfe\x0fL\xafi\x08\xcap\xae\xa6\xd2')
'PRIV:WM/WMCollectionID:Áç½³.þ\x0fL¯i\x08Êp®¦Ò'     PRIV(owner='WM/WMCollectionID', data=b'\xc1\xe7\xbd\xb3.\xfe\x0fL\xafi\x08\xcap\xae\xa6\xd2')
'PRIV:WM/WMContentID: