MaketRandevu/tests/phpunit/engine/Api/V1/fixtures/customer.json

{
    "id": 97,
    "firstname": "John",
    "lastname": "Doe",
    "email": "john@doe.com",
    "phone": "0123456789",
    "address": "Some Str. 123",
    "city": "Some City",
    "zip": "12345",
    "notes": "Test customer notes."
}