Creates a new chapter either as blank or from a URL.
The project_id of the project, you can query GET https://api.elevenlabs.io/v1/projects to list all available projects.
The name of the chapter, used for identification only.
An optional URL from which we will extract content to initialize the project. If this is set, ‘from_url’ must be null. If neither ‘from_url’ or ‘from_document’ are provided we will initialize the project as blank.
Successful Response