1 files changed, 8 insertions, 3 deletions
diff --git a/matrix-specification/Responses/ClientUserIdFilterPostResponse.php b/matrix-specification/Responses/ClientUserIdFilterPostResponse.php
index ed7ba37..0a5d062 100644
--- a/matrix-specification/Responses/ClientUserIdFilterPostResponse.php
+++ b/matrix-specification/Responses/ClientUserIdFilterPostResponse.php
@@ -2,18 +2,23 @@
 
 namespace Matrix\Responses;
 
-class ClientUserIdFilterPostResponse implements \JsonSerializable
+use Matrix\Response;
+
+class ClientUserIdFilterPostResponse extends Response
 {
   public function __construct(
     private string $filterId,
   )
   {
     if (str_starts_with($filterId, "{")) {
-      throw new \InvalidArgumentException("filterId cannot start with a { as this character is used to determine if the filter provided is inline JSON or a previously declared filter by homeservers on some APIs");
+      throw new \InvalidArgumentException(
+        "filterId cannot start with a { as this character is used to determine if the filter provided is inline JSON " .
+        "or a previously declared filter by homeservers on some APIs"
+      );
     }
   }
 
-  public function jsonSerialize(): array
+  public function getBody(): array
   {
     return [
       "filter_id" => $this->filterId,