Jmeter：正则表达式写法

场景：需要提取接口返回内容中的sid；
接口返回参数为：{"sid":"d2541a33-3fd8-49f7-8bcc-de1c04abf2d5","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":60000}

正则写法：sid":"(.+?)","upgrades