Akibat hukum akta jual beli yang dibacakan oleh pegawai kantor Pejabat Pembuat Akta Tanah (PPAT): studi kasus putusan Mahkamah Agung nomor 747 K/Pdt/2018 = Legal consequence of sale and purchase deed which represented by land deed official (PPAT) officer: case study the decisions of the Supreme Court number 747 K/Pdt/2018