curl --request POST \
  --url https://connect.pingback.com/v2/contacts \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "email": "example@email.com",
  "origin": {
    "url": "https://pingback.com",
    "utmSource": "source"
  },
  "attributes": {
    "name": "John Doe",
    "phone": "+5531999999999"
  }
}
'

{
  "message": "Contact created",
  "data": {
    "id": "ea8a2a47-2a05-4a43-b284-35df0ea46333",
    "email": "example@email.com"
  }
}