@Test(expected = IllegalArgumentException.class)
public void testSignatureParamCreationFromNoHexString() {

    String sig = "d8485d4771e9112cca6ac7e6b75fc52585t2e7ee9a702db4a39dfad0f888ea6c22b6185ceab" +
            "38d8322b67737a5574d8b63f4e27b0d208f3f9efcdbf56093f213";
    ContractParameter.signature(sig);
}