title: OTRS + REST + TicketCreate
body: <p>I am have difficulties to implement the REST service for Ticket Creation with OTRS, I already integrate TicketGet and TicketUpdate services with my system, but can't integrate with the TicketCreate service.</p>
  
  <p>yml file:</p>
  
  <pre><code>---
  Debugger:
    DebugThreshold: debug
    TestMode: '0'
  Description: Is used by me
  FrameworkVersion: 4.0.8
  Provider:
    Operation:
      TicketCreate:
        Description: TicketCreate
        MappingInbound:
          Type: Simple
        MappingOutbound:
          Config:
            KeyMapDefault:
              MapTo: ''
              MapType: Keep
            ValueMapDefault:
              MapTo: ''
              MapType: Keep
          Type: Simple
        Type: Ticket::TicketCreate
      TicketGet:
        Description: TicketGet
        MappingInbound:
          Type: Simple
        MappingOutbound:
          Type: Simple
        Type: Ticket::TicketGet
      TicketUpdate:
        Description: TicketUpdate
        MappingInbound:
          Type: Simple
        MappingOutbound:
          Type: Simple
        Type: Ticket::TicketUpdate
    Transport:
      Config:
        KeepAlive: ''
        MaxLength: '20000000'
        RouteOperationMapping:
          TicketCreate:
            RequestMethod:
            - POST
            Route: /TicketCreate
          TicketGet:
            Route: /TicketGet/:TicketID
          TicketUpdate:
            RequestMethod:
            - POST
            Route: /TicketUpdate/:TicketID
      Type: HTTP::REST
  RemoteSystem: ''
  Requester:
    Transport:
      Type: HTTP::REST
  </code></pre>
  
  <p>Request:</p>
  
  <pre><code>{
     "UserLogin":"web.service",
     "Password":"********",
     "Ticket":{
        "Title":"Title",
        "QueueID":"61",
        "LockID":"2",
        "TypeID":"1",
        "ServiceID":"",
        "SLAID":"",
        "StateID":"63",
        "PriorityID":"3",
        "CustomerUser":"user@email.com.br"
     },
     "Article":{
        "ArticleTypeID":"8",
        "SenderTypeID":"1",
        "From":"User &lt;user@email.com.br&gt;",
        "Subject":"WebService Proc Linner Teste",
        "Body":"Teste WebService",
        "ContentType":"text/plain",
        "MimeType":"text/plain",
        "Charset":"UTF8"
     }
  }
  </code></pre>
  
  <p>Return:</p>
  
  <pre><code>{
    "Error":
    {
      "ErrorCode":"TicketCreate.InvalidParameter",
      "ErrorMessage":"TicketCreate: Article-&gt;ContentType is invalid!"
    }
  }
  </code></pre>
  
  <p>what is a valid ContentType ?</p>
  
  <p>Can someone help me?</p>