Node nd = XPathAPI.selectSingleNode
                    (message.getSOAPBody().getFirstChild(), "//FinalPayment");
 
            if (nd != null) {
                Element token2 = (Element) nd;
 
                XMLSignatureFactory fac2 = XMLSignatureFactory.getInstance("DOM", xmlDSigProvider);
                List<Transform> transformList2 = new ArrayList<Transform>();
                Transform transformC14N22 = fac2.newTransform(Transforms.TRANSFORM_ENVELOPED_SIGNATURE, (XMLStructure) null);
                Transform transformC14N2 = fac2.newTransform(Transforms.TRANSFORM_C14N_EXCL_OMIT_COMMENTS, (XMLStructure) null);
                transformList2.add(transformC14N22);
                transformList2.add(transformC14N2);
 
                // Ссылка на подписываемые данные с алгоритмом хеширования ГОСТ 34.11.
                Reference ref2 = fac2.newReference("", fac2.newDigestMethod("http://www.w3.org/2001/04/xmldsig-more#gostr3411", null),
                        transformList2, null, null);
                SignedInfo si2 = fac2.newSignedInfo(fac2.newCanonicalizationMethod(CanonicalizationMethod.EXCLUSIVE,
                        (C14NMethodParameterSpec) null), fac2.newSignatureMethod("http://www.w3.org/2001/04/xmldsig-more#gostr34102001-gostr3411", null), Collections.singletonList(ref2));
                KeyInfoFactory kif2 = fac2.getKeyInfoFactory();
                X509Data x509d2 = kif2.newX509Data(Collections.singletonList((X509Certificate) certFk));
                KeyInfo ki2 = kif2.newKeyInfo(Collections.singletonList(x509d2));
 
                final XMLSignature sig2 = fac2.newXMLSignature(si2, ki2);
                DOMSignContext signContext2 = new DOMSignContext((Key) privateKeyFk, token2);
                signContext2.putNamespacePrefix(XMLSignature.XMLNS, "ds");
                sig2.sign(signContext2);
            }