Thank you in advance! Really hope some one can help!
<soap:Envelope
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Header>
<ResponseHeader
xmlns:ns2="https://adwords.google.com/api/adwords/cm/v201809"
xmlns="https://adwords.google.com/api/adwords/mcm/v201809">
<ns2:requestId>00057a7858a439180a8585977b036599</ns2:requestId>
<ns2:serviceName>CustomerService</ns2:serviceName>
<ns2:methodName>mutate</ns2:methodName>
<ns2:operations>1</ns2:operations>
<ns2:responseTime>162</ns2:responseTime>
</ResponseHeader>
</soap:Header>
<soap:Body>
<soap:Fault>
<faultcode>soap:Server</faultcode>
<faultstring>[RequiredError.REQUIRED @ customer]</faultstring>
<detail>
<ApiExceptionFault
xmlns="https://adwords.google.com/api/adwords/mcm/v201809"
xmlns:ns2="https://adwords.google.com/api/adwords/cm/v201809">
<ns2:message>[RequiredError.REQUIRED @ customer]</ns2:message>
<ns2:ApplicationException.Type>ApiException</ns2:ApplicationException.Type>
<ns2:errors
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns2:RequiredError">
<ns2:fieldPath>customer</ns2:fieldPath>
<ns2:fieldPathElements>
<ns2:field>customer</ns2:field>
</ns2:fieldPathElements>
<ns2:trigger></ns2:trigger>
<ns2:errorString>RequiredError.REQUIRED</ns2:errorString>
<ns2:ApiError.Type>RequiredError</ns2:ApiError.Type>
<ns2:reason>REQUIRED</ns2:reason>
</ns2:errors>
</ApiExceptionFault>
</detail>
</soap:Fault>
</soap:Body>
</soap:Envelope>
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Header>
<ns1:RequestHeader xmlns:ns1="https://adwords.google.com/api/adwords/mcm/v201809" soapenv:mustUnderstand="0">
<ns2:clientCustomerId xmlns:ns2="https://adwords.google.com/api/adwords/cm/v201809">YOUR_CLIENT_CUSTOMER_ID</ns2:clientCustomerId>
<ns3:developerToken xmlns:ns3="https://adwords.google.com/api/adwords/cm/v201809">REDACTED</ns3:developerToken>
<ns4:userAgent xmlns:ns4="https://adwords.google.com/api/adwords/cm/v201809">YOUR_USER_AGENT</ns4:userAgent>
<ns5:validateOnly xmlns:ns5="https://adwords.google.com/api/adwords/cm/v201809">false</ns5:validateOnly>
<ns6:partialFailure xmlns:ns6="https://adwords.google.com/api/adwords/cm/v201809">false</ns6:partialFailure>
</ns1:RequestHeader>
</soapenv:Header>
<soapenv:Body>
<mutate xmlns="https://adwords.google.com/api/adwords/mcm/v201809">
<customer>
<trackingUrlTemplate>http://tracker.example.com/?season={_season}&promocode={_promocode}&u={lpurl}"</trackingUrlTemplate>
</customer>
</mutate>
</soapenv:Body>
</soapenv:Envelope>
[13 Nov 2018 15:22:12,562-soapXmlLogger:DEBUG:main] SOAP response:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Header>
<ResponseHeader xmlns="https://adwords.google.com/api/adwords/mcm/v201809" xmlns:ns2="https://adwords.google.com/api/adwords/cm/v201809">
<ns2:requestId>00057a86ad1d01d80abc8e8bc500bc2b</ns2:requestId>
<ns2:serviceName>CustomerService</ns2:serviceName>
<ns2:methodName>mutate</ns2:methodName>
<ns2:operations>1</ns2:operations>
<ns2:responseTime>304</ns2:responseTime>
</ResponseHeader>
</soap:Header>
<soap:Body>
<mutateResponse xmlns="https://adwords.google.com/api/adwords/mcm/v201809" xmlns:ns2="https://adwords.google.com/api/adwords/cm/v201809">
<rval>
<customerId>YOUR_CLIENT_CUSTOMER_ID</customerId>
<currencyCode>PHP</currencyCode>
<dateTimeZone>Asia/Manila</dateTimeZone>
<descriptiveName>testacctone</descriptiveName>
<canManageClients>false</canManageClients>
<testAccount>true</testAccount>
<autoTaggingEnabled>false</autoTaggingEnabled>
<trackingUrlTemplate>http://tracker.example.com/?season={_season}&promocode={_promocode}&u={lpurl}"</trackingUrlTemplate>
<parallelTrackingEnabled>false</parallelTrackingEnabled>
<conversionTrackingSettings>
<effectiveConversionTrackingId>YOUR_CONVERSION_TRACKING_ID_NO_NEED_TO_SPECIFY_IN_THE_REQUEST</effectiveConversionTrackingId>
<usesCrossAccountConversionTracking>false</usesCrossAccountConversionTracking>
</conversionTrackingSettings>
<remarketingSettings>
<snippet>SNIPPET_VALUE_NO_NEED_TO_SPECIFY_IN_THE_REQUEST</snippet>
<googleGlobalSiteTag>TAG_VALUE_NO_NEED_TO_SPECIFY_IN_THE_REQUEST</googleGlobalSiteTag>
</remarketingSettings>
</rval>
</mutateResponse>
</soap:Body>
</soap:Envelope>