diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/publisher/ResourceRegistryPublisherImpl.java b/src/main/java/org/gcube/informationsystem/resourceregistry/publisher/ResourceRegistryPublisherImpl.java
index db2ce95..bf2b2ed 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/publisher/ResourceRegistryPublisherImpl.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/publisher/ResourceRegistryPublisherImpl.java
@@ -8,6 +8,7 @@ import java.util.Map;
 import java.util.UUID;
 
 import org.gcube.com.fasterxml.jackson.databind.JsonNode;
+import org.gcube.com.fasterxml.jackson.databind.ObjectMapper;
 import org.gcube.com.fasterxml.jackson.databind.node.ObjectNode;
 import org.gcube.common.gxhttp.reference.GXConnection;
 import org.gcube.common.gxhttp.request.GXHTTPStringRequest;
@@ -443,12 +444,14 @@ public class ResourceRegistryPublisherImpl extends BaseRequestInfo implements Re
 	public String create(String json)
 			throws SchemaViolationException, AlreadyPresentException, ResourceRegistryException {
 		try {
-			JsonNode jsonNode = JsonUtility.getJsonNode(json);
+			ObjectMapper mapper = new ObjectMapper();
+			JsonNode jsonNode = mapper.readTree(json);
 			String type = TypeUtility.getTypeName(jsonNode);
 			UUID uuid = UUIDUtility.getUUID(jsonNode);
 			if(uuid==null) {
 				uuid = UUIDManager.getInstance().generateValidUUID();
 				((ObjectNode) jsonNode).put(ERElement.ID_PROPERTY, uuid.toString());
+				json = mapper.writeValueAsString(jsonNode);
 			}
 			return create(type, json, uuid);
 		} catch (ResourceRegistryException e) {