Fix json deserialization

Change-Id: I2aa308ecfa97fabd14655a34811e052ba2317802
diff --git a/local/ce-fabric/src/main/java/org/opencord/ce/local/fabric/CarrierEthernetFabricManager.java b/local/ce-fabric/src/main/java/org/opencord/ce/local/fabric/CarrierEthernetFabricManager.java
index 66fb6db..e048f7b 100644
--- a/local/ce-fabric/src/main/java/org/opencord/ce/local/fabric/CarrierEthernetFabricManager.java
+++ b/local/ce-fabric/src/main/java/org/opencord/ce/local/fabric/CarrierEthernetFabricManager.java
@@ -246,7 +246,7 @@
 
         // Build URL and perform post
         WebTarget target = client.target("http://" + publicIp + ":" + port + "/onos/v1/network/configuration/");
-        Response response = target.request().post(Entity.entity(json, MediaType.APPLICATION_JSON_TYPE));
+        Response response = target.request().post(Entity.entity(json.toString(), MediaType.APPLICATION_JSON_TYPE));
         response.close();
     }