curl --request POST \
  --url https://public-api.lonescale.com/lists/{listId}/item \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "first_name": "<string>",
  "last_name": "<string>",
  "full_name": "<string>",
  "linkedin_url": "<string>",
  "company_name": "<string>",
  "current_position": "<string>",
  "domain": "<string>",
  "location": "<string>",
  "name": "<string>",
  "email": "jsmith@example.com",
  "contact_id": "<string>"
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "first_name": "<string>",
  "last_name": "<string>",
  "full_name": "<string>",
  "linkedin_url": "<string>",
  "company_name": "<string>",
  "current_position": "<string>",
  "domain": "<string>",
  "location": "<string>",
  "name": "<string>",
  "email": "jsmith@example.com",
  "contact_id": "<string>",
  "createdAt": "2023-11-07T05:31:56Z"
}