How to add crontab task by reboot / poweroff / poweron pc?

I have next record in crontab -e, running with user root.

@reboot /usr/bin/curl --silent --insecure -v -X GET https://?key=9d722304320de0b074d8da74bf680874&mes= 'nik-pc was rebooted or started!'

But it not work! p.s. if I run the command in the terminal - everything is fine. The goal is to cause a hook when you turn off / on / restart the PC.