An engine object is composed of the following fields:
_id: A string representing the identifier of the search engine.allowed_engine_options: An array of strings representing the supported engine options.author: Indicates who created this engine.created_at: A string representing the date and time, in the RFC 3339 format, that the engine was created.finetune: A boolean indicating whether this engine supports fine-tuning.ready: A boolean specifying whether this engine is ready to be used.updated_at: A string representing the date and time, in the RFC 3339 format, that the engine was updated.