curl --request POST \
  --url https://api.concord.tech/privacy-v1/organizations/{organizationId}/data-system-relationships \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "name": "<string>",
  "description": "<string>",
  "dataSystems": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "dateCreated": 123,
  "dateUpdated": 123,
  "organizationId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "readOnly": false,
  "description": "<string>",
  "dataSystems": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "crossBorder": false,
      "retention": "P2Y",
      "additionalNotes": "<string>",
      "dataSystemContacts": [],
      "dataSystemDestinations": [],
      "dataSystemRelationship": {},
      "dataSystemSecurityMeasures": [
        "<unknown>"
      ],
      "dataSystemOrigins": [],
      "dataSystemProcessingActivities": [],
      "dataSystemProcessingPurposes": [],
      "dataSystemDataCategories": [],
      "dataSystemDataSubjects": [],
      "icon": "<string>",
      "dateCreated": 123,
      "dateUpdated": 123,
      "organizationId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "organizationName": "<string>",
      "status": "<string>",
      "dataSystemTypeId": "<string>",
      "dataSystemType": [
        "<unknown>"
      ],
      "projectIds": [
        "<unknown>"
      ]
    }
  ],
  "predefineId": [
    "<unknown>"
  ]
}