Zoho Books API Response

Hi

I found that whenever I am making API calls for Zoho Books, I get "1" appended at last in the response of API. Please find the sample as follows for your reference.

{"code":0,"message":"The item has been added.","item":{"item_id":"259236000000178017","name":"Hard Drive 2","sku":"","image_name":"","status":"active","source":"api","is_linked_with_zohocrm":false,"zcrm_product_id":"","unit":"","description":"1TB, USB 3.0 interface 2400 rpm, protective hard case.","rate":190.00,"account_id":"259236000000000388","account_name":"Sales","tax_id":"","tax_name":"","tax_percentage":0,"tax_type":"","purchase_description":"","pricebook_rate":190.00,"purchase_rate":0.00,"purchase_account_id":"","purchase_account_name":"","inventory_account_id":"","inventory_account_name":"","item_type":"sales","is_taxable":true,"tax_exemption_id":"","tax_exemption_code":"","reorder_level":"","initial_stock":"","initial_stock_rate":"","vendor_id":"","vendor_name":"","custom_fields":[]}}

Could you please let me know the reason for this.?

Thanks