Architect Data Action 403 on ServiceNow Screen Recording Upload

Can’t get this config to load properly when attempting to upload screen recording artifacts via Data Action to ServiceNow. The Genesys Cloud webhook triggers successfully, but the ServiceNow REST API returns a 403 Forbidden error at /api/now/attachment/file. The payload includes a valid OAuth2 bearer token, yet the MID server logs indicate a permission mismatch. Verified the integration user has the upload_attachment role. Any insights on required scopes?

Thanks for the help.