Json 在HTTP请求中使用RESTful WCF服务

我试图通过使用发出POST请求来使用。不幸的是，我不知道JSON请求应该是什么样子

VB.NET项目的相关部分

IUserService.vb

<OperationContract(),
    WebInvoke(Method:="POST",
              UriTemplate:="/User/Create",
              RequestFormat:=WebMessageFormat.Json,
              ResponseFormat:=WebMessageFormat.Json,
              BodyStyle:=WebMessageBodyStyle.Bare)>
    Sub CreateUser(ByVal user As User)

Public Sub CreateUser(ByVal user As User) Implements IUserService.CreateUser
    user.UserObject.CreateUser(user)
End Sub

Private m_Id As Integer
Private m_Name As String
Private m_Age As Integer
Private m_Sex As Sex
Private m_Comments As String
Private Shared m_UserObj As User
Private m_LUser As List(Of User)

Public Shared ReadOnly Property UserObject() As User
    Get
        If m_UserObj Is Nothing Then
            m_UserObj = New User()
        End If

        Return m_UserObj
    End Get
End Property

Friend Sub CreateUser(ByVal user As User)
    LUser.Add(user)
End Sub

Public Enum Sex
    Male = 0
    Female = 1
End Enum

User.vb

<OperationContract(),
    WebInvoke(Method:="POST",
              UriTemplate:="/User/Create",
              RequestFormat:=WebMessageFormat.Json,
              ResponseFormat:=WebMessageFormat.Json,
              BodyStyle:=WebMessageBodyStyle.Bare)>
    Sub CreateUser(ByVal user As User)

Public Sub CreateUser(ByVal user As User) Implements IUserService.CreateUser
    user.UserObject.CreateUser(user)
End Sub

Private m_Id As Integer
Private m_Name As String
Private m_Age As Integer
Private m_Sex As Sex
Private m_Comments As String
Private Shared m_UserObj As User
Private m_LUser As List(Of User)

Public Shared ReadOnly Property UserObject() As User
    Get
        If m_UserObj Is Nothing Then
            m_UserObj = New User()
        End If

        Return m_UserObj
    End Get
End Property

Friend Sub CreateUser(ByVal user As User)
    LUser.Add(user)
End Sub

Public Enum Sex
    Male = 0
    Female = 1
End Enum

我尝试过类似的方法但没有成功（响应：400个错误请求）：

---

POST请求应该是什么样子？

我刚刚添加了以下标题：

内容类型：application/json

接受：application/json

它就像一个符咒