curl --request PUT \
  --url https://public-api.sessionboard.com/v1/event/{eventId}/contacts/{contactId} \
  --header 'Content-Type: application/json' \
  --header 'x-access-token: <api-key>' \
  --data '
{
  "updated_at": "2023-11-07T05:31:56Z",
  "first_name": "<string>",
  "last_name": "<string>",
  "email": "[email protected]",
  "company": "<string>",
  "title": "<string>",
  "phone": "<string>",
  "custom_fields": {}
}
'

{
  "id": "<string>",
  "friendly_id": "<string>",
  "full_name": "<string>",
  "first_name": "<string>",
  "last_name": "<string>",
  "email": "<string>",
  "created_at": "<string>",
  "updated_at": "<string>",
  "photo_url": "<string>",
  "company_name": "<string>",
  "title": "<string>",
  "about": "<string>",
  "phone_home": "<string>",
  "phone_mobile": "<string>",
  "address_line_1": "<string>",
  "address_line_2": "<string>",
  "address_city": "<string>",
  "address_state": "<string>",
  "address_postal_code": "<string>",
  "address_country": "<string>",
  "website_url": "<string>",
  "linkedin_url": "<string>",
  "twitter_url": "<string>",
  "facebook_url": "<string>",
  "honorific": "<string>",
  "salutation": "<string>",
  "pronouns": "<string>",
  "gender": "<string>",
  "past_companies": "<string>",
  "educational_affiliation": "<string>",
  "highest_level_of_education": "<string>",
  "ethnicity": "<string>",
  "languages": "<string>",
  "speaker_score": "<string>",
  "organization_contact": "<string>",
  "speaker_fee": "<string>",
  "availability": "<string>",
  "preferred_session_format": "<string>",
  "annual_revenue": "<string>",
  "headcount": "<string>",
  "years_in_operation": "<string>",
  "organization_structure": "<string>",
  "industry": "<string>",
  "global_region": "<string>",
  "audience_type": "<string>",
  "target_age_range": "<string>",
  "topic_expertise": "<string>",
  "brand": "<string>",
  "translated_fields": [
    {
      "id": "<string>",
      "name": "<string>",
      "type": "<string>",
      "parent_field_id": "<string>",
      "parent_field_source": "<string>",
      "parent_field_name": "<string>",
      "parent_field_internal_name": "<string>",
      "translated_language": "<string>",
      "value": "<string>"
    }
  ],
  "custom_fields": [
    {
      "id": "<string>",
      "name": "<string>",
      "value": "<string>",
      "type": "<string>",
      "internal_name": "<string>",
      "created_at": "<string>"
    }
  ]
}