Upsert your Collections. This endpoint is combination of bulk_update and bulk_create. Colection identifier is "Collection Name". If an existing collection with identicall name exists in JOOR, it will be updated. If a Collection with defined name does not exists in JOOR, it will be created. Endpoint is async, so you will receive a job_id which you can use to check a status. Default limit of objects which can be sent within single request is 20.