curl --request GET \
  --url https://api.sendrealm.com/contacts/{id} \
  --header 'Authorization: Bearer <token>'

{
  "status": 123,
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "email": "jsmith@example.com",
    "fields": {},
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "segments": [
      {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "name": "<string>",
        "is_subscribed": true,
        "attached_at": "2023-11-07T05:31:56Z"
      }
    ]
  },
  "error": null,
  "metadata": null
}