Optionaluse-If true, return the new 400 error response on invalid requests. Otherwise return a server error response on invalid requests.
Why does this parameter exist? Previously, our API was returning a 500 status code with a difficult-to-consume response body. We've fixed the response to have a 400 status code and a more useful body. This parameter enables a smooth transition without a breaking change; eventually, we'll completely remove the 500 response and this parameter won't be needed.
The ID of the content that will have labels added to it.