curl --request POST \
  --url https://api.pulsewave.dev/v1/contacts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "jsmith@example.com",
  "phone_number": "<string>",
  "first_name": "<string>",
  "last_name": "<string>",
  "metadata": {}
}
'

{
  "id": "ct_5n2p9x",
  "object": "contact",
  "email": "jsmith@example.com",
  "phone_number": "<string>",
  "first_name": "<string>",
  "last_name": "<string>",
  "subscribed": true,
  "metadata": {},
  "created_at": "2023-11-07T05:31:56Z"
}