curl --request POST \
  --url https://api.fivemanage.com/api/v2/audio \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: multipart/form-data' \
  --form file='@example-file' \
  --form 'metadata=<string>'

{
  "data": {
    "id": "7F9pGhN8qwErT1vx5aZk",
    "url": "https://i.fmfile.com/7F9pGhN8qwErT1vx5aZk.jpg"
  },
  "status": "ok"
}