diff --git a/main.py b/main.py
index 8026645..16e4f1a 100644
--- a/main.py
+++ b/main.py
@@ -50,8 +50,9 @@ async def fastapi_get_extension_data(network: str, key: str) -> str | None:
     return get_extension_data(network, key)
 
 @app.post('/setextensiondata')
-async def fastapi_set_extension_data(network: str, cs: ChangeSet) -> ChangeSet:
-    return set_extension_data(network, cs)
+async def fastapi_set_extension_data(network: str, req: Request) -> ChangeSet:
+    props = await req.json()
+    return set_extension_data(network, ChangeSet(props))
 
 ############################################################
 # project