contentSignature.setPrivateKey(keys.getPrivate());
contentSignature.setBodyHashRequired(false);
contentSignature.setAttribute("method", "GET");
contentSignature.setAttribute("uri", "/signed/request-only");
contentSignature.setAttribute("token", "1122");
request.header(DKIMSignature.DKIM_SIGNATURE, contentSignature);
ClientResponse response = request.delete();
Assert.assertEquals(200, response.getStatus());
String signatureHeader = (String)response.getResponseHeaders().getFirst(DKIMSignature.DKIM_SIGNATURE);
contentSignature = new DKIMSignature(signatureHeader);