https://www.alibabacloud.com/help/en/cms/cloudmonitor-1-0/developer-reference/api-cms-2019-01-01-putcustomeventrule
Use PutCustomEventRule to create a custom event-triggered alert rule - Cloud Monitor - Alibaba Cloud
Use the PutCustomEventRule API to create or modify custom event alert rules. This reference provides all parameters, request examples, and error codes.
create a custom event