upload a file to Object Storage using Spring RestTemplate

I have tried with this piece of code, based on https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutObject.html

    Resource resource = new ClassPathResource("logback.xml");
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.TEXT_PLAIN);

    HttpEntity<byte[]> requestEntity
            = new HttpEntity<>(StreamUtils.copyToByteArray(resource.getInputStream()), headers);

    Map<String, Object> parameters = new HashMap<>(4);
    parameters.put("cors_enabled", true);
    parameters.put("acl", "private");
    parameters.put("key", "my-key");
    parameters.put("Bucket", "https://cloud.linode.com/object-storage/buckets/eu-central-1/my-bucket-2020");

    restTemplate.put("https://api.linode.com/v4/object-storage/buckets", requestEntity, parameters);

but I have this response:

 org.springframework.web.client.HttpClientErrorException$MethodNotAllowed: 405 METHOD NOT ALLOWED: [{"errors": [{"reason": "Method Not Allowed"}]}]

I have also problems when getting an object:

       MultiValueMap<String, Object> body
            = new LinkedMultiValueMap<>();

    UriComponentsBuilder builder =
            UriComponentsBuilder.fromHttpUrl("https://api.linode.com/v4/object-storage/buckets/eu-central-1/my-bucket-2020/object-url");

    body.add("method", "GET");
    body.add("name", "43f959d930d-a11a-4f2cec88fd7e.JPG");

    HttpHeaders headers = new HttpHeaders();

    HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(body, headers);

    restTemplate.postForEntity(builder.build().encode().toUri(),
            requestEntity, LinodeResponse.class);

with this responde:

          org.springframework.web.client.HttpClientErrorException$BadRequest: 400 BAD REQUEST: [{"errors": [{"reason": "name is required", "field": "name"}, {"reason": "method is required", "field": "method"}]}]