curl --request POST \
  --url https://a.contactlevel.com/api/audiences/contacts/add \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "organization_id": "<string>",
  "audience_id": "<string>",
  "contact_id": "<string>"
}
'

{
  "organization_id": "<string>",
  "audience_id": "<string>",
  "contact": {
    "id": "<string>",
    "organization_id": "<string>",
    "data_import_id": "<string>",
    "contact_id": "<string>",
    "company_id": "<string>",
    "first_name": "<string>",
    "last_name": "<string>",
    "work_emails": [
      "<string>"
    ],
    "personal_emails": [
      "<string>"
    ],
    "phones": [
      "<string>"
    ],
    "linkedin_url": "<string>",
    "job_title": "<string>",
    "functional_area": "<string>",
    "company_name": "<string>",
    "company_linkedin_url": "<string>",
    "company_domain": "<string>",
    "company_country": "<string>",
    "company_industry": "<string>",
    "city": "<string>",
    "state_region": "<string>",
    "country": "<string>",
    "postal_code": "<string>",
    "age": 123,
    "dob": "2023-12-25",
    "year_of_birth": 123,
    "gender": "<string>",
    "person_image_url": "<string>",
    "company_image_url": "<string>"
  }
}