$chapter = $this->entityRepo->getEntityBySlug('chapter', $chapterSlug, $bookSlug);
$this->checkOwnablePermission('restrictions-manage', $chapter);
$this->entityRepo->updateEntityPermissionsFromRequest($request, $chapter);
$chapter = $this->entityRepo->getEntityBySlug('chapter', $chapterSlug, $bookSlug);
$this->checkOwnablePermission('restrictions-manage', $chapter);
$this->entityRepo->updateEntityPermissionsFromRequest($request, $chapter);