const [updated] = await client.entityMatching.update([{
 externalId: 'model123',
 update: { description: { set: 'ø' }}
}]);

{
  "items": [
    {
      "id": 4503599627370496,
      "externalId": "my.known.id",
      "status": "Queued",
      "createdTime": 1730204346000,
      "startTime": 1730204346000,
      "statusTime": 1730204346000,
      "name": "simple_model_1",
      "description": "Simple model 1",
      "errorMessage": null,
      "featureType": "simple",
      "matchFields": [
        {
          "source": "name",
          "target": "name"
        },
        {
          "source": "name",
          "target": "someField"
        }
      ],
      "ignoreMissingFields": true,
      "classifier": "randomforest",
      "originalId": 111
    }
  ]
}