query GetSystemFieldConfiguration($fieldKey: String!) {
  getSystemFieldConfiguration(fieldKey: $fieldKey) {
    id
    fieldKey
    configuration
    revision
  }
}

{
  "fieldKey": "string"
}

{
  "data": {
    "getSystemFieldConfiguration": {
      "id": "id",
      "fieldKey": "string",
      "configuration": "value",
      "revision": 1
    }
  }
}