@Test
public void toJsonReturnsExpected() {

    final AclModified underTest =
            AclModified.of(TestConstants.Thing.THING_ID, TestConstants.Thing.ACL, 2, TestConstants.TIMESTAMP,
                    TestConstants.EMPTY_DITTO_HEADERS, TestConstants.METADATA);
    final JsonObject actualJson = underTest.toJson(JsonSchemaVersion.V_1, FieldType.regularOrSpecial());
    assertThat(actualJson).isEqualToIgnoringFieldDefinitions(KNOWN_JSON
            .remove(Event.JsonFields.ID.getPointer())
            .set(Event.JsonFields.TYPE, AclModified.TYPE));
}