Is this possible?
i debugged this:
{"event_type":"state_changed","entity_id":"media_player.chromecast","event":{"entity_id":"media_player.chromecast","old_state":{"entity_id":"media_player.chromecast","state":"off","attributes":{"friendly_name":"Chromecast","supported_features":152461},"last_changed":"2020-12-09T12:12:43.608725+00:00","last_updated":"2020-12-09T12:12:43.608725+00:00","context":{"id":"afb418b0e13f9c91ca4f4e212013549a","parent_id":null,"user_id":"5a87ee0da4b94152836f55a7373f1975"}},"new_state":{"entity_id":"media_player.chromecast","state":"idle","attributes":{"volume_level":0.5,"is_volume_muted":false,"media_content_id":"http://192.168.178.35:52357/stream","media_content_type":"music","media_position":0,"media_position_updated_at":"2020-12-09T12:13:23.451849+00:00","media_title":"Streaming from AirConnect","media_artist":"","media_album_name":"","media_album_artist":"","app_id":"CC1AD845","app_name":"Default Media Receiver","entity_picture_local":"/api/media_player_proxy/media_player.chromecast?token=9e049bce9d417a7a6feac3cc9438546111decdbac741e28e8ec77b5249974fcb&cache=9896920dbf45226d","friendly_name":"Chromecast","entity_picture":"IMAGE.jpg","supported_features":152463},"last_changed":"2020-12-09T12:13:23.452503+00:00","last_updated":"2020-12-09T12:13:23.452503+00:00","context":{"id":"fbf3b9db43f4f81804681a22974c4fd6","parent_id":null,"user_id":null}}},"origin":"LOCAL","time_fired":"2020-12-09T12:13:23.452503+00:00","context":{"id":"fbf3b9db43f4f81804681a22974c4fd6","parent_id":null,"user_id":null}}
i want to remove (or change) media_title and app_name 
