我对此代码有问题：

const express = require('express');

const app = express();

app.use(express.urlencoded({ extended: true }));
app.use(express.json());

app.get('/', (req, res) => {
res.send([
    { id: 1, title: 'foo' }
]);
});

app.post('/', (req, res) => {
res.send({
        data: req.body
    })
    console.log("Geht");
});

app.listen(3000, () => {
console.log('Server listening on port 3000.');
});

如果我尝试使用“curl-xpost-d'{“user”：“jane.doe”}'-h”内容类型：application/jsonhttp://localhost:3000/“例如，我总是遇到以下错误：
syntaxerror:invokecallback（c:\programmieren\node test\node\modules\body parser\lib\types\json.js:89:19）的c:\programmieren\node test\node\modules\body parser\lib\read.js:121:18（c:\programmieren\node test\node\modules\raw body\index.js:224:16）的json（json:\programmieren\node:19）的json中json中json位置1处json中出现意外的标记u在incomingmessage.oned（c:\programmieren\node test\node_modules\raw body\index.js:273:7）在incomingmessage.emit（events.js:327:22）在endreadablent（internal/streams/readable.js:1327:12）在process和rejections（internal/process/task_queues.js:80:21）在incomingmessage.oned.oned.oned.onent（c:\programmier/streams\node\u modules:27
有人能告诉我一个解决办法吗？