ustar := tr.blk.toUSTAR()
		hdr.Uname = p.parseString(ustar.userName())
		hdr.Gname = p.parseString(ustar.groupName())
		hdr.Devmajor = p.parseNumeric(ustar.devMajor())
		hdr.Devminor = p.parseNumeric(ustar.devMinor())

		var prefix string
		switch {
		case format.has(FormatUSTAR | FormatPAX):
			hdr.Format = format
			ustar := tr.blk.toUSTAR()
			prefix = p.parseString(ustar.prefix())

					return errors.New("accessKey: Expected string")
				}
				c.AccessKey, err = jsonparser.ParseString(value)
				return err
			}
			if string(key) == "aud" {
				if dataType != jsonparser.String {
					return errors.New("aud: Expected string")
				}
				c.Audience, err = jsonparser.ParseString(value)
				return err
			}
		case 'e':
			if string(key) == "exp" {