The following returns MultiPolygon (((10 -5, 15 5, 5 5, 10 -5)))
SELECT NEW ST_MultiPolygon(0x01060000000100000001030000000100000004000000000000000000244000000000000014c00000000000002e40000000000000144000000000000014400000000000001440000000000000244000000000000014c0)