Create mandate

$bankAccountIban = new BankAccountIban();
$bankAccountIban->iban = 'DE46720200700359736690';

$contactDetails = new MandateContactDetails();
$contactDetails->emailAddress = 'wile.e.coyote@acmelabs.com';

$mandateAddress = new MandateAddress();
$mandateAddress->city = 'Monumentenvallei';
$mandateAddress->countryCode = 'NL';
$mandateAddress->street = 'Woestijnweg';
$mandateAddress->zip = '1337XD';

$name = new MandatePersonalName();
$name->firstName = 'Wile';
$name->surname = 'Coyote';

$personalInformation = new MandatePersonalInformation();
$personalInformation->name = $name;
$personalInformation->title = 'Miss';

$customer = new MandateCustomer();
$customer->bankAccountIban = $bankAccountIban;
$customer->companyName = 'Acme labs';
$customer->contactDetails = $contactDetails;
$customer->mandateAddress = $mandateAddress;
$customer->personalInformation = $personalInformation;

$body = new CreateMandateRequest();
$body->customer = $customer;
$body->customerReference = 'idonthaveareference';
$body->language = 'nl';
$body->recurrenceType = 'UNIQUE';
$body->signatureType = 'UNSIGNED';

$response = $client->v1()->merchant('merchantId')->mandates()->create($body);

{
    "mandate" : {
        "customerReference" : "idonthaveareference",
        "customer" : {
            "bankAccountIban" : {
                "iban" : "DE46720200700359736690"
            },
            "mandateAddress" : {
                "street" : "Woestijnweg",
                "city" : "Monumentenvallei",
                "zip" : "1337XD",
                "countryCode" : "NL"
            },
            "companyName" : "Acme labs",
            "contactDetails" : {
                "emailAddress" : "wile.e.coyote@acmelabs.com"
            },
            "personalInformation" : {
                "name" : {
                    "firstName" : "Wile",
                    "surname" : "Coyote"
                },
                "title" : "Miss"
            }
        },
        "recurrenceType" : "UNIQUE",
        "status" : "ACTIVE",
        "uniqueMandateReference" : "42268d8067df43e18a50a2ebf4bdb729"
    }
}

{
    "errorId" : "15eabcd5-30b3-479b-ae03-67bb351c07e6-00000092",
    "errors" : [
        {
            "code" : "20000000",
            "propertyName" : "customer.billingAddress.street",
            "message" : "PARAMETER_NOT_FOUND_IN_REQUEST"
        }
    ]
}