curl --request POST \
  --url https://api.example.com/v1/entities/simplified \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "n": "<string>",
  "vp": [
    "<string>"
  ],
  "p": [
    {
      "n": "<string>",
      "t": "ATTACHMENT",
      "ref": "<string>",
      "op": [
        "<string>"
      ],
      "isUnique": true
    }
  ]
}
'