As system, step and attachment ids must be provided in the response of the REST API for Test step creation

PUT /rest/raven/1.0/api/test/{testKey}/step

{
   "step":"example step",
   "data":"example data",
   "result":"example result",
   "attachments":[
      {
         "data":"gsddfgdsfg...(base64) ",
         "filename":"example1.txt",
         "contentType":"plain/text"
      },
      {
         "data":"gsddfgdsfg...(base64) ",
         "filename":"example2.txt",
         "contentType":"plain/text"
      }
   ]
}

{
  "id": 123,
  "attachmentIds": [11, 12]
}