@Test
 public void testTrack() {
   String json = serializer.serialize(TestCases.track);
   BasePayload got = serializer.deseralize(json);
   Assert.assertEquals(TestCases.track, got);
 }
 @Test
 public void testAlias() {
   String json = serializer.serialize(TestCases.alias);
   BasePayload got = serializer.deseralize(json);
   Assert.assertEquals(TestCases.alias, got);
 }
 @Test
 public void testIdentify() {
   String json = serializer.serialize(TestCases.identify);
   BasePayload got = serializer.deseralize(json);
   Assert.assertEquals(TestCases.identify, got);
 }