diff --git a/src/main/base/org/bdware/sc/event/REvent.java b/src/main/base/org/bdware/sc/event/REvent.java
index cb71895..dfcbaef 100644
--- a/src/main/base/org/bdware/sc/event/REvent.java
+++ b/src/main/base/org/bdware/sc/event/REvent.java
@@ -91,13 +91,12 @@ public class REvent extends SM2Verifiable implements Serializable {
     @Override
     public String getContentStr() {
         return String.format("{\"topic\":\"%s\",\"content\":\"%s\",\"type\":\"%s\"," +
-                        "\"semantics\":\"%s\",\"requestID\":\"%s\",\"txHash\":\"%s\"}",
+                        "\"semantics\":\"%s\",\"requestID\":\"%s\"}",
                 topic,
                 content,
                 type,
                 semantics,
-                requestID,
-                (null == txHash ? "" : txHash));
+                requestID);
     }
 
     public enum REventType {