docs: def load_id3(self, track):
          """ Load id3 tags from strack metadata """
          if not isinstance(track, strack):
              raise TypeError('strack object required')
  
          timestamp = calendar.timegm(parse(track.get("created-at")).timetuple())
  
          self.mapper[TIT1] = TIT1(text=track.get("description"))
          self.mapper[TIT2] = TIT2(text=track.get("title"))
          self.mapper[TIT3] = TIT3(text=track.get("tags-list"))
          self.mapper[TDOR] = TDOR(text=str(timestamp))
          self.mapper[TLEN] = TLEN(text=track.get("duration"))
          self.mapper[TOFN] = TOFN(text=track.get("permalink"))
          self.mapper[TCON] = TCON(text=track.get("genre"))
          self.mapper[TCOP] = TCOP(text=track.get("license"))
          self.mapper[WOAS] = WOAS(url=track.get("permalink-url"))
          self.mapper[WOAF] = WOAF(url=track.get("uri"))
          self.mapper[TPUB] = TPUB(text=track.get("username"))
          self.mapper[WOAR] = WOAR(url=track.get("user-url"))
          self.mapper[TPE1] = TPE1(text=track.get("artist"))
          self.mapper[TALB] = TALB(text="%s Soundcloud tracks"
                                   % track.get("artist"))
  
          if track.get("artwork-path") is not None:
              self.mapper[APIC] = APIC(value=track.get("artwork-path"))