curl --request POST \
  --url https://api.reply.io/v4/contacts/import \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "items": [
    {
      "email": "john@example.com",
      "firstName": "John",
      "lastName": "Doe",
      "company": "Acme"
    },
    {
      "email": "jane@example.com",
      "firstName": "Jane",
      "lastName": "Smith",
      "company": "Globex"
    }
  ],
  "options": {
    "overwriteExisting": false,
    "skipExisting": true,
    "detectTimeZone": true,
    "listIds": [
      10,
      20
    ]
  }
}
'

{
  "items": [
    {
      "id": 12345,
      "status": "Created",
      "error": null
    },
    {
      "id": 12346,
      "status": "Updated",
      "error": null
    },
    {
      "id": null,
      "status": "Failed",
      "error": "Email is required"
    }
  ],
  "added": 1,
  "updated": 1,
  "skipped": 0,
  "failed": 1
}