diff --git a/example/lib/main.dart b/example/lib/main.dart
index b385e5e..2ec16c7 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -80,7 +80,11 @@ class _DemoPageState extends State<DemoPage> {
   Future<void> _trackDemoEvent() async {
     await Analytics.track(
       'DEMO_BUTTON_CLICK',
-      eventParams: const <String, dynamic>{'page': 'demo'},
+      eventParams: const <String, dynamic>{
+        'page': 'demo',
+        'Url': 'https://example.com/demo',
+        'ButtonId': 'demo_btn_01',
+      },
       customTags: const <String, dynamic>{'tenantId': 't1', 'feature': 'demo'},
     );
     await _refreshCount();
diff --git a/lib/src/network/api_client.dart b/lib/src/network/api_client.dart
index 40287cd..51bc718 100644
--- a/lib/src/network/api_client.dart
+++ b/lib/src/network/api_client.dart
@@ -30,7 +30,7 @@ class ApiException implements Exception {
   @override
   String toString() =>
       'ApiException(statusCode: $statusCode, retryable: $retryable, '
-      'message: $message)';
+      'message: $message, data: $data)';
 }
 
 /// 与后端埋点接口通信的客户端。