POST Teste/CriaMensagem

{
  "message": {
    "campaign_id": "sample string 1",
    "domain_id": "sample string 2",
    "html_body": "sample string 3",
    "text_body": "sample string 4",
    "list_ids": [
      "sample string 1",
      "sample string 2"
    ],
    "name": "sample string 5",
    "sender_name": "sample string 6",
    "sender": "sample string 7",
    "subject": "sample string 8",
    "scheduled_to": "sample string 9"
  }
}

<LocaWebModel.Envio xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/LocaWebAPI.Models">
  <message>
    <campaign_id>sample string 1</campaign_id>
    <domain_id>sample string 2</domain_id>
    <html_body>sample string 3</html_body>
    <list_ids xmlns:d3p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
      <d3p1:string>sample string 1</d3p1:string>
      <d3p1:string>sample string 2</d3p1:string>
    </list_ids>
    <name>sample string 5</name>
    <scheduled_to>sample string 9</scheduled_to>
    <sender>sample string 7</sender>
    <sender_name>sample string 6</sender_name>
    <subject>sample string 8</subject>
    <text_body>sample string 4</text_body>
  </message>
</LocaWebModel.Envio>