diff --git a/src/main/java/com/eactive/eai/adapter/http/dynamic/filter/HmacSha256VerifyFilterKjb.java b/src/main/java/com/eactive/eai/adapter/http/dynamic/filter/HmacSha256VerifyFilterKjb.java
index 92bed3d..182e48c 100644
--- a/src/main/java/com/eactive/eai/adapter/http/dynamic/filter/HmacSha256VerifyFilterKjb.java
+++ b/src/main/java/com/eactive/eai/adapter/http/dynamic/filter/HmacSha256VerifyFilterKjb.java
@@ -14,6 +14,7 @@ import javax.servlet.http.HttpServletResponse;
 //import org.apache.commons.net.util.Base64;
 import org.springframework.http.HttpStatus;
 import org.apache.commons.lang3.StringUtils;
+import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
 import org.json.simple.JSONValue;
 
@@ -157,18 +158,17 @@ public class HmacSha256VerifyFilterKjb implements HttpAdapterFilter  {
 		String outboundBody = (String) resultMessage;
 
 		try {
-			
-			if (outboundBody.startsWith(KJB_ROOTLESS_ARRAY)) {
-				outboundBody = outboundBody.substring(KJB_ROOTLESS_ARRAY.length());
-				
-				if (outboundBody.endsWith("}")) {
-					outboundBody = outboundBody.substring(0, outboundBody.length() - 1);
-				}
+
+			Object root = JSONValue.parse(outboundBody);
+
+			if (root instanceof JSONObject && ((JSONObject) root).containsKey("KJB_ROOTLESS_ARRAY")) {
+				JSONArray jsonArray = (JSONArray) ((JSONObject) root).get("KJB_ROOTLESS_ARRAY");
+				outboundBody = jsonArray.toJSONString();
 			}
-			
+
 			String clientSecret = assignClientSecret(prop, request);
 			String macBody = calculateHMAC(outboundBody, clientSecret);
-			
+
 			response.addHeader("x-obp-signature-body", macBody);
 			response.addHeader("x-obp-partnercode", request.getHeader("x-obp-partnercode"));
 			response.addHeader("x-obp-txid", prop.getProperty(TransactionContextKeys.TRANSACTION_UUID,""));