reminder_name, phone, message, cron_expression (required) · timezone, msg_type (0 text, 1 image, 2 file), img_url, file_url, whatsapp_client_id (optional)
No timezone = UTC; a time zone we don’t know skips the row. whatsapp_client_id is the ID shown on each card on WhatsApp numbers – leave it empty to use any connected number.