Required Fields:

• email or phone - At least one contact method is required

Optional Fields:

• first_name - Contact's first name
• last_name - Contact's last name
• phone - Phone number (any format)
• date_of_birth - Format: YYYY-MM-DD
• gender - male, female, other, prefer_not_to_say
• address - Street address
• address_line_2 - Apartment, suite, etc.
• city - City name
• state - Two-letter state code
• zip_code - ZIP/Postal code
• district - District name
• opted_in - true/false or 1/0
• preferred_contact_method - phone, email, sms, mail
• preferred_language - Language code (e.g., en, es)
• volunteer_status - active, inactive, interested, not_interested
• engagement_level - high, medium, low, none
• source - How the contact was acquired
• notes - Additional notes