Hey, I am trying to update the permission for media uploaded, via code. During debugging I can see it's showing me the updated values. But I guess I am doing something wrong while saving the persmission. Please see below code and let me know what wrong here or how I can fix it.

// Here type of mediaReference is ContentReference and _securityRepository is IContentSecurityRepository

var mediaSecurityDescriptor = _securityRepository.Get(mediaReference).CreateWritableClone() as IContentSecurityDescriptor;
if (mediaSecurityDescriptor != null)
{
    if (mediaSecurityDescriptor.IsInherited) mediaSecurityDescriptor.ToLocal();
    mediaSecurityDescriptor.AddEntry(new AccessControlEntry("Everyone", AccessLevel.Read, SecurityEntityType.Role));
    _securityRepository.Save(mediaReference, mediaSecurityDescriptor, SecuritySaveType.None);
}

See the below screenshot, in which it's clearly visible the the values are updating. I add the Everyone role which on added as permission in CMS.

This is after updates

Please advice why it's not updating.