Resolved: Using json key as a field in java object

{
  "name1": {
    "key1": "value1",
    "key2": "value2"
  }
}

@lombok.Data
public class Example {

    private String name;

    private Map<String,String> properties = new HashMap<>();

    public Example(String name) {
        this.name = name;
    }

    public void add(String attr1, String val1) {
        properties.put(attr1, val1);
    }

    public static void main(String[] args) throws JsonProcessingException {
        Example bean = new Example("name1");
        bean.add("key1", "value1");
        bean.add("key2", "value2");

        String result = new ObjectMapper().writerWithDefaultPrettyPrinter().writeValueAsString(bean);
        System.out.println(result);
    }
}

{
  "name" : "name1",
  "properties" : {
    "key1" : "value1",
    "key2" : "value2"
  }
}

@ToString
public class Example {

    @JsonIgnore
    private String name;

    @JsonIgnore
    private Map<String, Map<String,String>> properties;

    public Example() {
        properties = new HashMap<>();
    }

    public Example(String name) {
        this();
        this.name = name;
        properties.put(name, new HashMap<>());
    }

    public void add(String attr1, String val1) {
        properties.get(name).put(attr1, val1);
    }

    @JsonAnyGetter
    public Map<String, Map<String, String>> getProperties() {
        return properties;
    }

    @JsonAnySetter
    public void setProperties(String name, Map<String,String> props) {
        this.name = name;
        this.properties.put(name, props);
    }

    public static void main(String[] args) throws JsonProcessingException {
        Example bean = new Example("name1");
        bean.add("key1", "value1");
        bean.add("key2", "value2");

        ObjectMapper objectMapper = new ObjectMapper();
        String result = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(bean);
        System.out.println(result);

        Example parsed = objectMapper.readValue(result, Example.class);
        System.out.println(parsed);
    }
}

{
  "name1" : {
    "key1" : "value1",
    "key2" : "value2"
  }
}

Example(name=name1, properties={name1={key1=value1, key2=value2}})