Repository origRepository = worldManager.getRepository();
Repository repository = origRepository.getTrack();
repository.createAccount(Hex.decode(addr_1));
repository.addBalance(Hex.decode(addr_1), BigInteger.valueOf(expectedBalance));
repository.startTracking();
repository.createAccount(Hex.decode(addr_2));
repository.saveCode(Hex.decode(addr_2), Hex.decode(codeString));
repository.addStorageRow(Hex.decode(addr_2), new DataWord(101), new DataWord(1000001));
repository.addStorageRow(Hex.decode(addr_2), new DataWord(102), new DataWord(1000002));