diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SharingManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SharingManager.java
index b0dc3d8..acfb78f 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SharingManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/SharingManager.java
@@ -8,6 +8,7 @@ import javax.ws.rs.DefaultValue;
 import javax.ws.rs.POST;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
 
 import org.gcube.com.fasterxml.jackson.core.JsonProcessingException;
@@ -19,6 +20,7 @@ import org.gcube.informationsystem.base.reference.Element;
 import org.gcube.informationsystem.base.reference.IdentifiableElement;
 import org.gcube.informationsystem.context.reference.entities.Context;
 import org.gcube.informationsystem.model.reference.properties.Header;
+import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.resource.ResourceNotFoundException;
@@ -66,7 +68,7 @@ public class SharingManager {
 	 * 
 	 * Each instance is managed without considering the propagation constraint of relations. 
 	 * 
-	 * POST /sharing/contexts/{CONTEXT_UUID}?operation=(ADD|REMOVE)&[dryRun=true]
+	 * POST /sharing/contexts/{CONTEXT_UUID}?operation=PUT(ADD|REMOVE)&[dryRun=true]
 	 * 
 	 * e.g 
 	 * POST /resource-registry/contexts/67062c11-9c3a-4906-870d-7df6a43408b0?operation=ADD&dryRun=true
@@ -79,7 +81,7 @@ public class SharingManager {
 	 * 
 	 */
 	// @POST
-	// @Path("{" + SharingPath.CONTEXTS_PATH_PART + "/{" + AccessPath.CONTEXT_UUID_PATH_PARAM + "}")
+	// @Path("/{" + SharingPath.CONTEXTS_PATH_PART + "/{" + AccessPath.CONTEXT_UUID_PATH_PARAM + "}")
 	public String addRemoveNoPropagationConstraint(
 			@PathParam(AccessPath.CONTEXT_UUID_PATH_PARAM) String contextId,  
 			@QueryParam(SharingPath.OPERATION_QUERY_PARAMETER) SharingOperation operation,
@@ -155,8 +157,9 @@ public class SharingManager {
 	 * 
 	 */
 	@POST
-	@Path("{" + SharingPath.CONTEXTS_PATH_PART + "/{" + AccessPath.CONTEXT_UUID_PATH_PARAM + "}/"
-			  + AccessPath.TYPE_PATH_PARAM + "}" + "/{" + AccessPath.UUID_PATH_PARAM + "}")
+	@Path("/" + SharingPath.CONTEXTS_PATH_PART + "/{" + AccessPath.CONTEXT_UUID_PATH_PARAM + "}/"
+		+ "{" + AccessPath.TYPE_PATH_PARAM + "}" + "/{" + AccessPath.UUID_PATH_PARAM + "}")
+	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String addRemove(
 			@PathParam(AccessPath.CONTEXT_UUID_PATH_PARAM) String contextId,
 			@PathParam(AccessPath.TYPE_PATH_PARAM) String type,