[{"label": "Product", "default": "", "type_id": 1, "readonly": true, "field_name": "product_name", "order_index": 1}, {"hidden": true, "type_id": 1, "required": true, "field_name": "product_id", "data_column": "product_id", "order_index": 0}, {"label": "Discount Amount", "type_id": 2, "required": true, "field_name": "discount_amount", "data_column": "discount_amount", "order_index": 2, "placeholder": "Enter discount amount"}, {"label": "Start Date", "type_id": 3, "required": true, "field_name": "start_date", "data_column": "start_date", "order_index": 3}, {"label": "End Date", "type_id": 3, "required": true, "field_name": "end_date", "data_column": "end_date", "order_index": 4}]