The mapping options in JSON format. Here is an example of the JSON structure: json { "link_entities": true, // Determines whether to link related entities during the import process "unlink_entities": false, // Determines whether to unlink related entities during the import process "update_existing_records": true, // Determines whether to update based on company ID or treat every row as create "unset_empty_attributes": false // Determines whether to unset a specific attribute during update if the values input is blank }