{
  "evaluated": 3,
  "accepted": [
    {
      "source_record": 1,
      "external_id": "001",
      "name": "Ada",
      "country": "GB"
    },
    {
      "source_record": 2,
      "external_id": "002",
      "name": "Milo",
      "country": "US"
    }
  ],
  "rejected": [
    {
      "source_record": 3,
      "errors": [
        {
          "field": "external_id",
          "code": "required",
          "message": "Supply a stable customer identifier."
        }
      ]
    }
  ]
}