Log Message in Structured Format

Format this log message in structured JSON format.

Event to log:
{{event_description}}

Log level: {{log_level}}
Service: {{service}}

Constraints:
- JSON format with specific fields
- Required fields: timestamp, level, message, service
- Optional fields: requestId, userId, duration, error
- Message: max 100 characters, human readable
- Add context fields relevant to the event
- No PII in log messages
- Timestamp in ISO 8601 format

Output the JSON log entry.