def METHOD_NAME(self, record):
    """
    Map from Python LogRecord attributes to JSON log format fields
    * from - https://docs.python.org/3/library/logging.html#logrecord-attributes
    * to - https://mana.mozilla.org/wiki/pages/viewpage.action?pageId=42895640
    """
    out = dict(
        Timestamp=int(record.created * 1e9),
        Type=record.name,
        Logger=self.logger_name,
        Hostname=self.hostname,
        EnvVersion=self.LOGGING_FORMAT_VERSION,
        Severity=self.SYSLOG_LEVEL_MAP.get(record.levelno, self.DEFAULT_SYSLOG_LEVEL),
        Pid=record.process,
    )
    # Include any custom attributes set on the record.
    # These would usually be collected metrics data.
    fields = dict()
    for key, value in record.__dict__.items():
        if key not in self.EXCLUDED_LOGRECORD_ATTRS:
            fields[key] = value
    # Only include the 'message' key if it has useful content
    # and is not already a JSON blob.
    message = record.getMessage()
    if message:
        if not message.startswith("{") and not message.endswith("}"):
            fields["message"] = message
    # If there is an error, format it for nice output.
    if record.exc_info is not None:
        fields["error"] = repr(record.exc_info[1])
        fields["traceback"] = safer_format_traceback(*record.exc_info)
    out["Fields"] = fields
    return json.dumps(out)