diff --git a/pom.xml b/pom.xml
index 86ad561..68004e3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -60,21 +60,28 @@
 		<dependency>
 			<groupId>com.sun.xml.bind</groupId>
 			<artifactId>jaxb-core</artifactId>
-			<version>2.2.11</version>
+			<version>2.3.0</version>
 			<scope>provided</scope>
 		</dependency>
 
 		<dependency>
 			<groupId>com.sun.xml.bind</groupId>
 			<artifactId>jaxb-impl</artifactId>
-			<version>2.2.11</version>
+			<version>2.3.0</version>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.glassfish</groupId>
+			<artifactId>javax.json</artifactId>
+			<version>1.1.2</version>
 			<scope>provided</scope>
 		</dependency>
 
 		<dependency>
 			<groupId>org.eclipse.persistence</groupId>
 			<artifactId>org.eclipse.persistence.moxy</artifactId>
-			<version>2.5.2</version>
+			<version>2.7.3</version>
 		</dependency>
 
 		<dependency>
diff --git a/src/main/java/org/gcube/data/analysis/dminvocation/DataMinerInvocationManager.java b/src/main/java/org/gcube/data/analysis/dminvocation/DataMinerInvocationManager.java
index 2b167c6..8df4d71 100644
--- a/src/main/java/org/gcube/data/analysis/dminvocation/DataMinerInvocationManager.java
+++ b/src/main/java/org/gcube/data/analysis/dminvocation/DataMinerInvocationManager.java
@@ -20,7 +20,7 @@ import javax.xml.transform.stream.StreamSource;
 import javax.xml.validation.Schema;
 import javax.xml.validation.SchemaFactory;
 
-import org.eclipse.persistence.jaxb.MarshallerProperties;
+import org.eclipse.persistence.jaxb.JAXBContextProperties;
 import org.gcube.data.analysis.dminvocation.model.DataMinerInvocation;
 import org.xml.sax.SAXException;
 
@@ -97,12 +97,15 @@ public class DataMinerInvocationManager {
 
 	    switch (mediaType) {
 		case ApplicationJSON:
-			jaxbMarshaller.setProperty(MarshallerProperties.JSON_INCLUDE_ROOT, Boolean.TRUE);
+			jaxbMarshaller.setProperty(JAXBContextProperties.JSON_INCLUDE_ROOT, true);
+			jaxbMarshaller.setProperty(JAXBContextProperties.JSON_ATTRIBUTE_PREFIX, "@");
+			break;
 		case ApplicationXML:
 		default:
-			jaxbMarshaller.setProperty(MarshallerProperties.MEDIA_TYPE, mediaType.getMimeType());
+
 		}
 
+		jaxbMarshaller.setProperty(JAXBContextProperties.MEDIA_TYPE, mediaType.getMimeType());
 	    ByteArrayOutputStream baos = new ByteArrayOutputStream();
 	    jaxbMarshaller.marshal(dmInvocation, baos);
 	    return baos;
@@ -130,12 +133,14 @@ public class DataMinerInvocationManager {
 
 	    switch (mediaType) {
 		case ApplicationJSON:
-			jaxbUnmarshaller.setProperty(MarshallerProperties.JSON_INCLUDE_ROOT, Boolean.TRUE);
+			jaxbUnmarshaller.setProperty(JAXBContextProperties.JSON_INCLUDE_ROOT, true);
+			jaxbUnmarshaller.setProperty(JAXBContextProperties.JSON_ATTRIBUTE_PREFIX, "@");
+			break;
 		case ApplicationXML:
 		default:
-			jaxbUnmarshaller.setProperty(MarshallerProperties.MEDIA_TYPE, mediaType.getMimeType());
-		}
 
+		}
+	    jaxbUnmarshaller.setProperty(JAXBContextProperties.MEDIA_TYPE, mediaType.getMimeType());
 	    return (DataMinerInvocation) jaxbUnmarshaller.unmarshal(dmInvocationXMLStream);
 
 	}
diff --git a/src/main/java/org/gcube/data/analysis/dminvocation/model/DataMinerInvocation.java b/src/main/java/org/gcube/data/analysis/dminvocation/model/DataMinerInvocation.java
index 50dd7d1..aa9847a 100644
--- a/src/main/java/org/gcube/data/analysis/dminvocation/model/DataMinerInvocation.java
+++ b/src/main/java/org/gcube/data/analysis/dminvocation/model/DataMinerInvocation.java
@@ -33,7 +33,11 @@ import org.gcube.data.analysis.dminvocation.ActionType;
 @ToString
 public class DataMinerInvocation implements Serializable{
 
-	private static final long serialVersionUID = -3642902539322040226L;
+	/**
+	 *
+	 */
+	private static final long serialVersionUID = 8506240125306265159L;
+
 
 	@XmlElement(name = "operator-id", required=true, nillable=false)
 	private String operatorId;
diff --git a/src/test/java/DataMinerInvocationTest.java b/src/test/java/DataMinerInvocationTest.java
index c3a6506..8a72d71 100644
--- a/src/test/java/DataMinerInvocationTest.java
+++ b/src/test/java/DataMinerInvocationTest.java
@@ -56,7 +56,7 @@ public class DataMinerInvocationTest {
 //		DataMinerParameters params = new DataMinerParameters(inputParams, outputParams);
 
 		DataMinerInvocation dmInvocation = new DataMinerInvocation();
-		dmInvocation.setOperatorId(operatorID);
+		//dmInvocation.setOperatorId(operatorID);
 		//dmInvocation.setParameters(params);
 		System.out.println(dmInvocation);
 
@@ -78,10 +78,14 @@ public class DataMinerInvocationTest {
 		ByteArrayOutputStream outStreamJSON = dmMng.marshaling(dmInvocation, MediaType.ApplicationXML, true);
 		System.out.println(new String(outStreamJSON.toByteArray()));
 
+		outStreamJSON = dmMng.marshaling(dmInvocation, MediaType.ApplicationJSON, true);
+		System.out.println(new String(outStreamJSON.toByteArray()));
+
 	}
 
-	//@Test
+	@Test
 	public void unmarshallingJSONTest() throws JAXBException, IOException, SAXException{
+		System.out.println(DataMinerInvocationTest.class.getMethods()[2].getName()+" called");
 		FileInputStream dmInvocationJSONFile = new FileInputStream(new File("./src/test/resources/DataMinerInvocation.json"));
 		DataMinerInvocation dmInvocation = dmMng.unmarshaling(dmInvocationJSONFile, MediaType.ApplicationJSON, true);
 		System.out.println(dmInvocation);
@@ -90,4 +94,17 @@ public class DataMinerInvocationTest {
 		System.out.println(new String(outStreamXML.toByteArray()));
 
 	}
+
+//	public static void main(String[] args) throws JAXBException, IOException, SAXException {
+//		parameters.put("[key1]", "[value1]");
+//		parameters.put("[key2]", "[value2]");
+//		dmMng = DataMinerInvocationManager.getInstance();
+//		System.out.println(DataMinerInvocationTest.class.getMethods()[2].getName()+" called");
+//		FileInputStream dmInvocationJSONFile = new FileInputStream(new File("./src/test/resources/DataMinerInvocation.json"));
+//		DataMinerInvocation dmInvocation = dmMng.unmarshaling(dmInvocationJSONFile, MediaType.ApplicationJSON, true);
+//		System.out.println(dmInvocation);
+//
+//		ByteArrayOutputStream outStreamXML = dmMng.marshaling(dmInvocation, MediaType.ApplicationXML, true);
+//		System.out.println(new String(outStreamXML.toByteArray()));
+//	}
 }
diff --git a/src/test/resources/DataMinerInvocation.json b/src/test/resources/DataMinerInvocation.json
index 28deac5..28fa007 100644
--- a/src/test/resources/DataMinerInvocation.json
+++ b/src/test/resources/DataMinerInvocation.json
@@ -1,15 +1,17 @@
 {
    "dataminer-invocation" : {
       "operator-id" : "org.gcube.dataanalysis.wps.statisticalmanager.synchserver.mappedclasses.transducerers.MPA_INTERSECT",
+      "action" : "RUN",
       "parameters" : {
          "input" : {
-            "param" : [ {
+            "param" : {
                "key" : "fileId",
                "value" : "http://publicLinkToFile"
-            }, {
+            },
+            "param" : {
                "key" : "param2",
                "value" : "value2"
-            } ]
+            }
          }
       }
    }