ClientResponse response = request.delete();
Assert.assertEquals(200, response.getStatus());
String signatureHeader = (String)response.getResponseHeaders().getFirst(DKIMSignature.DKIM_SIGNATURE);
contentSignature = new DKIMSignature(signatureHeader);
Verification verification = new Verification(keys.getPublic());
verification.setBodyHashRequired(false);
verification.getRequiredAttributes().put("token", "1122");
verification.verify(contentSignature, response.getResponseHeaders(), null, keys.getPublic());
response.releaseConnection();
}