curl --request POST \
  --url https://api.us.lexful.app/v1/entity_types/{entityTypeIdOrName}/properties/{propertyName} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-Account-ID: <api-key>' \
  --data '
{
  "name": "<string>",
  "type": "<string>",
  "required": true,
  "display_name": "<string>",
  "enum": [
    "<string>"
  ]
}
'

{
  "name": "<string>",
  "type": "string",
  "display_name": "<string>",
  "required": true,
  "description": "<string>",
  "enum": [
    "<string>"
  ],
  "array": {
    "type": "string",
    "properties": [
      {
        "name": "<string>",
        "type": "string",
        "required": true,
        "description": "<string>",
        "enum": [
          "<string>"
        ]
      }
    ]
  },
  "file_rules": {
    "max_size": 123,
    "allowed_extensions": [
      "<string>"
    ],
    "allowed_mime_types": [
      "<string>"
    ]
  }
}