curl --request POST \
  --url https://api-prod.interactly.ai/campaigns/v1/contacts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "first_name": "<string>",
  "last_name": "<string>",
  "phone_number": "<string>",
  "email": "<string>",
  "dob": "<string>",
  "notification_preferences": {
    "call": {
      "enabled": true,
      "dnd": {}
    },
    "sms": {
      "enabled": true,
      "dnd": {}
    },
    "email": {
      "enabled": true,
      "dnd": {}
    }
  }
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}