curl --request PATCH \
  --url https://app.kapso.ai/api/v1/whatsapp_contacts/{identifier} \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '{
  "contact": {
    "profile_name": "John Doe - VIP Customer",
    "metadata": {
      "vip": true,
      "subscription_tier": "premium"
    }
  }
}'

{
  "data": {
    "id": "contact-789ghi",
    "wa_id": "1234567890",
    "profile_name": "John Doe",
    "metadata": {},
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}