Update event.js

Author: neSpecc

src/models/event.js

@@ -71,7 +71,17 @@ class Event {
    */
   fillModel(schema) {
     Object.keys(schema).forEach(prop => {
-      this[prop] = schema[prop];
+
+      if (prop === 'timestamp') {
+        if (!this.payload) {
+          this.payload = {};
+          this.payload['timestamp'] = schema[prop];
+        } else {
+          this.payload[prop] = schema[prop];
+        }
+      } else {
+        this[prop] = schema[prop];
+      }
     });
   }
 }