The input LlmUpdateCommands have to specify originSourceId and originRecordId. If the record field is present, it has to have the same schema as the source dataset named originSourceId. Schema mapping and any existing transformations in the project will be applied before persisting the record to the unified dataset. The raw record will be persisted to the source dataset as well.
Note: This method has two query parameters that are available for testing purposes only: transform and defaultSourceName.