Java Spring JSON解析错误：带有数组的JSON解析Java错误。为什么？

org.springframework.web.client.RestClientException: Error while extracting response for type [class com.radar.dto.WorldDTO] and content type [application/json;charset=UTF-8]; 
nested exception is org.springframework.http.converter.HttpMessageNotReadableException: 
JSON parse error: Cannot deserialize instance of `com.radar.dto.WorldDTO` out of START_ARRAY token; 
nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `com.radar.dto.WorldDTO` out of START_ARRAY token
 at [Source: (PushbackInputStream); line: 1, column: 1]

我正在尝试获取的JSON格式：

[
    {
        "id": "110",
        "name": "England",
        "areas": [
            {
                "id": "1620",
                "name": "London"
            },
            ...
        ]
    },
    ...
]

dto类：

@Data
public class WorldDTO {
    private List<CountryDTO> countries;
}

@Data
private static class CountryDTO {
    @JsonProperty(value = "id")
    private String id;

    @JsonProperty(value = "name")
    private String name;

    @JsonProperty(value = "areas")
    private List<AreaDTO> areas;
}

@Data
public class AreaDTO {
    @JsonProperty(value = "id")
    private String id;

    @JsonProperty(value = "name")
    private String name;
}

我调用API的一段代码：

RequestEntity<?> request = new RequestEntity<>(HttpMethod.GET, uri);
ResponseEntity<WorldDTO> response = restTemplate.exchange(request, new ParameterizedTypeReference<>() {});
WorldDTO dto = response.getBody();

List countries;@JsonProperty

我究竟做错了什么？