@Test
public void testVerify() throws Exception {

  final ECDSAKey key =
      new ECDSAKeyGenerator().create(new BigInteger(1, Base58Utils.decode(PRIVATE_KEY)));
  final byte[] message = Base58Utils.decode(MESSAGE);
  final ECDSASignature signature = new ECDSASignature(
      new BigInteger(
          "112903116466171247254957852742074885675578841047850429300671823964741881940578"),
      new BigInteger(
          "48378612163565051950304976934001209911695304131357129876678389874012900275807"));
  assertTrue(key.verify(message, signature));
}