Java Zendesk Post票证失败，Android中的422 |不可处理实体

在我的应用程序中，使用Zendesk API与客户进行交互。直到3个月前，我们的支持团队收到了邮件。但现在我们正在升级Zendesk API 2。 如下

https://<domain>.zendesk.com/api/v2/tickets.json

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你能帮忙吗？

当通过我的model/poco类将过去的地方设置为空时，我就有了这个问题

HttpURLConnection connection = client.open(new URL(encoded_url));
            connection.setRequestMethod("POST");
            if (null != contentType) connection.addRequestProperty("Content-type", "application/json");

            // Write the request.
            out = connection.getOutputStream();
            out.write(data.getBytes("UTF-8"));
            out.close();

            final int statusCode = connection.getResponseCode();
            if (statusCode >= HttpURLConnection.HTTP_BAD_REQUEST) {
                onComplete.execute(false, statusCode + "|" + connection.getResponseMessage() + "|" + encoded_url, "Error " + statusCode + " while retrieving data from " + encoded_url + "\nreason phrase: " + connection.getResponseMessage());
                return;
            }

            // Read the response.
            in = connection.getInputStream();
            byte[] response = readFully(in);