Salesforce Apex Rest Callout 更新JSON形式的数据

public with sharing class callOutSample {
    public static Map<String, Object> getInfoCallOut() {
        Map<String, Object> results = new Map<String, Object>();
        Http http = new Http();
        HttpRequest request = new HttpRequest();
        request.setEndpoint('https://th-apex-http-callout.herokuapp.com/animals');
        request.setMethod('GET');
        HttpResponse response = http.send(request);
        System.debug('>>>debuglog>>>>>>>>>>response>>>>>>>>>>>>>'+response);
        // If the request is successful, parse the JSON response.
        if(response.getStatusCode() == 200) {
            // Deserialize the JSON string into collections of primitive data types.
            results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());
        }
        return results;
    }
    public static Map<String, Object> setInfoCallOut(String inputJson) {
        Map<String, Object> results = new Map<String, Object>();
        Http http = new Http();
        HttpRequest request = new HttpRequest();
        request.setEndpoint('https://th-apex-http-callout.herokuapp.com/animals');
        request.setMethod('POST');
        request.setHeader('Content-Type', 'application/json;charset=UTF-8');
        // Set the body as a JSON object
        request.setBody(inputJson);
        HttpResponse response = http.send(request);
        // Parse the JSON response
        if(response.getStatusCode() != 201) {
            System.debug('The status code returned was not expected: ' + response.getStatusCode() + ' ' + response.getStatus());
        } else {
            System.debug(response.getBody());
            results = (Map<String, Object>) JSON.deserializeUntyped(response.getBody());
        }
        return results;
    }
}

public with sharing class callOutApex {
    public static void getInfoCallOut() {
        Map<String, Object> results = callOutSample.getInfoCallOut();
        // // Cast the values in the 'animals' key as a list
        List<Object> animals = (List<Object>) results.get('animals');
        System.debug('Received the following animals:');
        for(Object animal: animals) {
            System.debug(animal);
        }
    }
    public static void setInfoCallOut() {
        Map<String, Object> results = callOutSample.setInfoCallOut('{"name":"mighty moose"}');
        // // Cast the values in the 'animals' key as a list
        List<Object> animals = (List<Object>) results.get('animals');
        System.debug('Received the following animals:');
        for(Object animal: animals) {
            System.debug(animal);
        }
    }
}