diff --git a/src/main/java/org/bdware/server/ws/EventActions.java b/src/main/java/org/bdware/server/ws/EventActions.java
index 4b4a2a7..b61665d 100644
--- a/src/main/java/org/bdware/server/ws/EventActions.java
+++ b/src/main/java/org/bdware/server/ws/EventActions.java
@@ -10,8 +10,15 @@ import org.bdware.server.action.CMActions;
 public class EventActions {
     @Action(async = true, userPermission = 0)
     public void subEvent(JsonObject args, final ResultCallback rcb) {
+        JsonObject ret = new JsonObject();
+        ret.addProperty("action", "onSubEvent");
+        ret.addProperty("status", "Error");
+        if (args.has("requestID")) {
+            ret.addProperty("responseID", args.get("requestID").getAsString());
+        }
         if (!args.has("topic")) {
-            rcb.onResult("{\"status\":\"Error\",\"data\":\"no topic arg!\"}");
+            ret.addProperty("data", "no topic arg!");
+            rcb.onResult(ret.toString());
             return;
         }
         String topic = args.get("topic").getAsString();
@@ -19,12 +26,16 @@ public class EventActions {
             String argCID = args.get("contractID").getAsString();
             ContractClient client = CMActions.manager.getClient(argCID);
             if (null == client) {
-                rcb.onResult("{\"status\":\"Error\",\"data\":\"invalid contract ID or Name!\"}");
+                ret.addProperty("data", "invalid contract ID or Name!");
+                rcb.onResult(ret.toString());
                 return;
             }
             String contractID = client.getContractID();
             topic = HashUtil.sha3(contractID + topic);
         }
         CMActions.manager.subEventByClient(topic, rcb.getChannel());
+        ret.addProperty("status", "Success");
+        ret.addProperty("data", topic);
+        rcb.onResult(ret.toString());
     }
 }