docs: def _decode_token_compact(token):
      """
      Decode a compact-serialized JWT
      Returns {'header': ..., 'payload': ..., 'signature': ...}
      """
      header, payload, raw_signature, signing_input = _unpack_token_compact(token)
      token = { 
          "header": header,
          "payload": payload,
          "signature": base64url_encode(raw_signature)
      }
      return token