AddClipToTrackActionObjectAddTrackActionObjectAddClipToTrackActionObjectPropertiesactionsclipcreateTracksinsertIndexmashredoSelectiontrackIndextrackTypetypeundoSelectionactionsactions: Actionsclipclip: ClipcreateTrackscreateTracks: numberinsertIndexinsertIndex: numbermashmash: MashredoSelectionredoSelection: MashEditorSelectiontrackIndextrackIndex: numbertrackTypetrackType: TrackTypetypetype: ActionTypeundoSelectionundoSelection: MashEditorSelection