Force card to re-render

I’m writing a front-end card and, after a user action causes some changes to the content, I would like HA to call my render function immediately, instead of waiting for the rest of whatever the refresh interval is.

How can I do this?

I know I can call a service to update the underlying entity, and that will cause a re-render; but this doesn’t really have to go to that level of the entity, or to the back-end.

I just want to produce the front-end HTML again quickly, on demand.

Thanks in advance for any help!