diff --git a/app/core/content/utils.py b/app/core/content/utils.py
index 35171aa..8f3fed3 100644
--- a/app/core/content/utils.py
+++ b/app/core/content/utils.py
@@ -51,7 +51,7 @@ async def create_metadata_for_item(
             f"{PROJECT_HOST}/api/v1/storage",
             files={"file": ('metadata.json', metadata_bin, 'application/json')},
             headers={
-                'X-Service-Signature': signer.sign(metadata_bin),
+                'X-Service-Signature': signer.sign(metadata_hash),
                 'X-Message-Hash': metadata_hash_b58,
             }
         )