This code creates a new account in Nutshell with an example address.

example_soap_clent.php

<?php
define('USERNAME', 'jim@demo.nutshell.com');
define('PASSWORD', '43c789d483fd76547b1f157e3cf5e580b95b9d8c');

function findEndpoints($username) {
    $soapClient = new SoapClient("http://api.nutshell.com/v1/soap?wsdl");
    return $soapClient->getApiForUsername($username);
}

$endpoints = findEndpoints(USERNAME);
$soapOptions = array(
    'soap_version' => SOAP_1_2,
    'user_agent' => 'Nutshell',
    'login' => USERNAME,
    'password' => PASSWORD,
    'trace' => true,
);
$soapClient = new SoapClient("http://{$endpoints['api']}/api/v1/soap?wsdl", $soapOptions);
$result = $soapClient->newAccount(array(
    'name' => 'this is a test',
    'address' => array(
        // One array for each address.
        // This request just has one, but you can have an unlimited number of addresses on an account
        array(
            'address_1' => '100 Second St.',
            'address_2' => 'Apt. 4',
            'address_3' => 'c/o Barclay Fowler',
            'city' => 'Ann Arbor',
            'state' => 'MI',
            'postalCode' => '48103',
            'country' => 'US',
        ),
    ),
));
var_dump($result);
echo $soapClient->__getLastRequest();