You can create a sandbox based on an existing property, hostname, or property version. Refer to the example JSONs for each use case in the Recipes. In order to create a sandbox with this method, you need to have an API client for the Sandbox API with read-write access and Property Manager authorization enabled in Control Center.
Create a sandbox from a property hostname
Create a sandbox based on a specific property version.
Click Try It! to start a request and see the response here!