1 files changed, 2 insertions, 2 deletions
diff --git a/src/fields/AudioField.ts b/src/fields/AudioField.ts
index 996d2556d..87e47a715 100644
--- a/src/fields/AudioField.ts
+++ b/src/fields/AudioField.ts
@@ -20,11 +20,11 @@ export class AudioField extends BasicField<URL> {
         return new AudioField(this.Data);
     }
 
-    ToJson(): { type: Types, data: string, _id: string } {
+    ToJson() {
         return {
             type: Types.Audio,
             data: this.Data.href,
-            _id: this.Id
+            id: this.Id
         };
     }