custom head detection

on right-click:
    if event-block is a player skull:
        if block-nbt of event-block contains "{Owner:{Id:""a3aaf70d-ae2e-44f8-9f4c-e5a27c74db85"",Properties:{textures:[{Value:""eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYjRiZDlkZDEyOGM5NGMxMGM5NDVlYWRhYTM0MmZjNmQ5NzY1ZjM3YjNkZjJlMzhmN2IwNTZkYzdjOTI3ZWQifX19""}]}}":