https://stackoverflow.com/questions/29313687/trying-to-use-spring-boot-rest-to-read-json-string-from-post
https://therealdanvega.com/blog/2017/07/05/read-json-data-spring-boot-write-database
https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/json/JsonParser.html