postman发送json嵌套， 后端 @RequestBody 接收不到

遇到了一个很奇葩的问题，具体是这样的：
postman 通过 post 方式发送请求，请求参数是一个嵌套的json，后端是@RequestBody修饰的实体类接参的，

具体的json数据：

{"ipAddress":"192.168.110.179","ipv6Address":"::","portNo":"38050","protocol":"HTTP","macAddress":"ec:c8:9c:c4:5c:b3","channelID":"1","dateTime":"2021-12-14T19:23:52+08:00","activePostCount":"157","eventType":"ANPR","eventState":"active","eventDescription":"ANPR","channelName":"IP CAPTURE CAMERA","deviceID":"jnjtzf0001","aNPR":{"licensePlate":"车牌","line":"1","confidenceLevel":"0","plateType":"unknown","plateColor":"blue","licenseBright":"0","pilotsafebelt":"unknown","vicepilotsafebelt":"unknown","pilotsunvisor":"unknown","vicepilotsunvisor":"unknown","envprosign":"unknown","dangmark":"unknown","uphone":"unknown","pendant":"unknown","tissueBox":"unknown","label":"unknown","decoration":"unknown","plateCharBelieve":"0","speedLimit":"0","illegalInfo":{"illegalCode":"0"},"vehicleType":"unknown","featurePicFileName":"1","detectDir":"8","detectType":"1","barrierGateCtrlType":"0","alarmDataType":"0","dwIllegalTime":"0","vehicleInfo":{"color":"white"},"gPSInfo":{"longitude":{"degree":"117","minute":"6","sec":"49.910000"},"latitude":{"degree":"117","minute":"6","sec":"49.910000"}}},"UUID":"602cf998-1dd2-11b2-a842-be6ebc977415","picNum":"1"}

后端：



大家知道以上事例即可。
出现的问题是： 发送请求后，没能收到外层实体类的参数，内层的ANPR对象，一直是 null .
解决的方式是： 给该属性添加注解 @JsonProperty(“aNPR”)
注：有时候接收的项目，不是很规范，请大大多多留意！！！