Hi,
I am trying to update a Document Library name/title via the HTTP Request following the Working with lists and list items with REST | Microsoft Docs
POST https://{site_url}/_api/web/lists(guid'{list_guid}')
Authorization: "Bearer " + accessToken
Accept: "application/json;odata=verbose"
Content-Type: "application/json"
Content-Length: {length of request body as integer}
If-Match: "{etag or *}"
X-HTTP-Method: "MERGE"
X-RequestDigest: "{form_digest_value}"
{
"__metadata": {
"type": "SP.List"
},
"Title": "New title"
}
I have done this in flow as below;

But get this error below;

When I run the step without the body i see that I am getting an correct response back from SP..
Any ideas?
Thanks