The topics below provide a reference for Conversion Rule fields.
You must adhere to the restrictions defined for each field. Otherwise, the server will return 400 Bad Request.
Required - field must be included when creating a new resource.
Read-only - should never be sent to the server. Appears only when fetching a resource.
Final - set once when creating the resource. Thereafter, is read-only.
Custom Audience Rules have very similar fields to Conversion Rules. Unless noted otherwise, fields apply for either object.