return errors.New("iss: Expected string")
				}
				c.Issuer, err = jsonparser.ParseString(value)
				return err
			}
		case 'n':
			if string(key) == "nbf" {
				if dataType != jsonparser.Number {
					return errors.New("nbf: Expected number")
				}
				c.NotBefore, err = jsonparser.ParseInt(value)
				return err
			}
		case 's':
			if string(key) == "sub" {