faker generated one from our dev env:

```
{
  "resourceType": "CareTeam",
  "status": "active",
  "name": "ACW239AG Care Team",
  "subject": {
    "reference": "Patient/40d91b7f-2ecc-4998-90da-05386f6a7f13",
    "type": "Patient",
    "identifier": {
      "id": "40d91b7f-2ecc-4998-90da-05386f6a7f13"
    },
    "display": "Abel Treutel"
  },
  "participant": [
    {
      "role": [
        {
          "text": "Caregiver"
        }
      ],
      "member": {
        "reference": "Practitioner/f83cfbd2-4080-44dc-9142-dd89217dca60",
        "type": "Practitioner",
        "identifier": {
          "id": "f83cfbd2-4080-44dc-9142-dd89217dca60"
        },
        "display": "Joesph Gibson"
      }
    },
    {
      "role": [
        {
          "text": "Primary Care Physician"
        }
      ],
      "member": {
        "type": "Practitioner",
        "identifier": {
          "id": "d4ac56bb-9dca-4cdd-ab38-8338b641d8a8"
        },
        "reference": "Practitioner/d4ac56bb-9dca-4cdd-ab38-8338b641d8a8",
        "display": "Jimmy Hayes"
      }
    }
  ],
  "managingOrganization": [
    {
      "reference": "Organization/edf36358-30dd-4ff6-8ff3-a6f41f59f526",
      "type": "Organization",
      "identifier": {
        "id": "edf36358-30dd-4ff6-8ff3-a6f41f59f526"
      },
      "display": "Abbycare"
    }
  ],
  "id": "4a421143-10c3-45b8-925b-cf038188ec06",
  "meta": {
    "versionId": "5d6c86d9-23a4-46fb-b031-0e1a2a9b4bc3",
    "lastUpdated": "2023-09-13T16:20:17.751Z",
    "author": {
      "reference": "ClientApplication/7fb13016-b451-4010-99c4-c0cf91305f8c",
      "display": "abbycare-dev Default Client"
    },
    "project": "3a54fb19-c820-4c6b-b6da-ed55cb3331a6",
    "compartment": [
      {
        "reference": "Project/3a54fb19-c820-4c6b-b6da-ed55cb3331a6"
      },
      {
        "reference": "Patient/40d91b7f-2ecc-4998-90da-05386f6a7f13",
        "type": "Patient",
        "identifier": {
          "id": "40d91b7f-2ecc-4998-90da-05386f6a7f13"
        },
        "display": "Abel Treutel"
      }
    ]
  }
}
```

GET {{medplum_host}}/fhir/R4/CareTeam?participant=f83cfbd2-4080-44dc-9142-dd89217dca60

is empty