@@ -2210,7 +2210,7 @@ Fired when a user ends a live broadcast. Public event — can be subscribed to w
 
 ### `broadcast.chat`
 
-Fired when the filtered user receives a chat message in a broadcast that they own. Private event — requires user-context authentication with the `broadcast.read` scope. The `payload` includes the `broadcast_id`, the chat `message_id` and `message` text, and an `author` block with the sending user's profile.
+Fired when the filtered user receives a chat message in a broadcast that they own. Private event — requires user-context authentication with the `broadcast.read` scope. The `payload` includes the `broadcast_id`, the chat `message_id` and `message` text, an `is_subscriber` boolean, and an `author` block with the sending user's profile.
 
 ```json title="broadcast.chat" expandable lines wrap icon="/icons/xds/icon-brackets.svg"
 {
@@ -2225,6 +2225,7 @@ Fired when the filtered user receives a chat message in a broadcast that they ow
       "broadcast_id": "1mGPaZaAdNqJN",
       "message_id": "2090000000000000004",
       "message": "test",
+      "is_subscriber": false,
       "author": {
         "data": {
           "affiliation": {