6a is op_return, 02 is 'push 2 bytes on stack' 6d01 are those two 'set name' bytes, 06 is 'push 6 bytes on stack', 746573742032 are those six bytes which equal to 'test 2' in UTF-8.
By looking at 6d byte you can get all Memo related actions from the blockchain (with a bit of 'false positives' that you will later filter out).
