Email in /api/v3/contacts

Email in /api/v3/contacts

How could I add an email or phone number to new contact using Contacts INVOICE API?
Even if I put it in JSON, contact saved with empty fields.
{
"contact_name": "Sarah Doe",
"company_name": "Testimonial LTD",
"payment_terms": 15,
"email": "example@gmail.com",
"phone": "+18001234567", 
"website": "www.example.org"
}