curl -X POST 'https://api.keygen.sh/v1/accounts/example/machines'
  -H 'Content-Type: application/vnd.api+json'
  -H 'Accept: application/vnd.api+json'
  -H 'Authorization: Bearer {TOKEN}'
  -d '{
        "data": {
          "type": "machines",
          "attributes": {
            "fingerprint": "{MAC_ADDRESS_FINGERPRINT}",
            "platform": "Windows",
            "name": "Office Laptop"
          },
          "relationships": {
            "license": {
              "data": {
                "type": "licenses",
                "id": "4097d726-6cc5-4156-8575-3a96387e19b4"
              }
            }
          }
        }
      }'