Restify nested params with multipart

I'm trying to make a POST request to send something like this but so far I'm failing to get nested params

{
  "title": "some title",
  "description": "some description",
  "services": [
    {
      "description":"service 0 description",
      "file":"<Buffer 77 65 66 77 69......>"
    },
    {
      "description":"service 1 description",
      "file":"<Buffer 77 65 66 77 69......>"
    }
  ]
}

via Juan Fuentes