This API is used to add new attributes to the tenant schema or edit/update an existing attribute in the schema.
Only system administrators can invoke this API.
To add multiple attributes to an empty schema, add them to the list and make the update call with this API.
To add a single attribute to a schema that already has attributes, use the GetSchema endpoint to get a list of attributes currently in the schema, add the new attribute to the list, and then call this API with the updated complete list.
The JSON in the request body must include all current attributes in the schema plus the new attributes.