curl --request POST \
  --url https://api.getarbol.com/v1/contacts/merge \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "primaryContactId": "<string>",
  "secondaryContactId": "<string>"
}
'

{
  "id": "<string>",
  "givenName": "<string>",
  "familyName": "<string>",
  "displayName": "<string>",
  "contactPoints": [
    {
      "id": "<string>",
      "value": "<string>",
      "label": "<string>",
      "isPrimary": true,
      "isVerified": true
    }
  ],
  "addresses": [
    {
      "id": "<string>",
      "streetAddress": "<string>",
      "addressLocality": "<string>",
      "addressRegion": "<string>",
      "postalCode": "<string>",
      "addressCountry": "<string>",
      "isPrimary": true
    }
  ],
  "aiSummary": "<string>",
  "metadata": {},
  "createdAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z"
}