如何修复 CURL 错误“无法解析主机”？

我正在尝试使用一些 json 数据在 Windows 控制台上发出 POST 请求，但出现此错误：

curl: (6) Could not resolve host: John,
curl: (6) Could not resolve host: lName
curl: (6) Could not resolve host: Doe,
curl: (6) Could not resolve host: phone
curl: (6) Could not resolve host: 0123456789,
curl: (6) Could not resolve host: passwd
curl: (6) Could not resolve host: myPassword,
curl: (6) Could not resolve host: tosAgm
curl: (3) [globbing] unmatched close brace/bracket in column 5
{}

请求如下所示：

curl -d '{"fName": "John", "lName": "Doe", "phone": "0123456789", "passwd": "myPassword", "tosAgm": "true"}' -H "Content-Type: application/json" -X POST http://localhost:3000/users

在做了一些研究之后，我发现请求是正确的，那么为什么我会收到这个错误呢？如何解决？