To simplify things and help our users to be more productive, we have archived the current forum and focus our efforts on helping developers on Stack Overflow. You can post new questions on Stack Overflow or join our Discord channel.
As far as I know, there is no easy way. You'd need to add the event notification mechanism somewhere in Grid's client-side code, and then send the information to the server. Grid's client-side API is designed to allow customization, so there shouldn't be huge blockers. Perhaps you could implement it with an extension, but if it is a too limited way, you'd need to extend Grid.
Perhaps making a custom renderer and some trickery would be an easier solution; perhaps by handing DOMNodeRemoved events in a renderer, when the cell in the special row is removed when it's scrolled away. However, I'm not immediately sure at which point the rendered elements are actually removed when they are scrolled out of view, so this solution might not work exactly as it should.