[{ "start": 0, "length": 524288, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 0},
{ "start": 524288, "length": 524288, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 524288}]

done.