Similar to LocationUpdate, add a hidden field to the ContentUpdate. When such a struct is {{POST}}ed to {{/content/objects/

}}, the relevant ContentService::hideContent() or revealContent() is called on the item.

For developer: ref.: https://github.com/ezsystems/ezplatform-rest/blob/v1.0.0-beta1/src/lib/Server/Controller/Location.php#L421-L425 for the existing implementation for LocationUpdate.