<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:mkt="http://www.marketo.com/mktows/">
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="http://www.marketo.com/mktows/">
</SOAP-ENV:Envelope>
and then
Request
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:mkt="http://www.marketo.com/mktows/">
<soapenv:Header>
<mkt:AuthenticationHeader>
<mktowsUserId>xxx</mktowsUserId>
<requestSignature>xxx</requestSignature>
<requestTimestamp>xxx</requestTimestamp>
<audit></audit>
<mode></mode>
</mkt:AuthenticationHeader>
</soapenv:Header>
<soapenv:Body>
<mkt:paramsDescribeMObject>
<objectName>ActivityRecord</objectName>
</mkt:paramsDescribeMObject>
</soapenv:Body>
</soapenv:Envelope>
Response
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns1="http://www.marketo.com/mktows/">
<SOAP-ENV:Body>
<ns1:successDescribeMObject>
<result>
<metadata>
<name>ActivityRecord</name>
<description>Composite object composed of fields from Event, Campaign, Lead, and Company</description>
<isCustom>false</isCustom>
<isVirtual>true</isVirtual>
<fieldList>
<field>
<name>id</name>
<description>Unique system id of Event</description>
<displayName xsi:nil="true"/>
<sourceObject>Event</sourceObject>
<dataType>integer</dataType>
<size>10</size>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>true</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>activityDateTime</name>
<description>Event timestamp</description>
<displayName xsi:nil="true"/>
<sourceObject>Event</sourceObject>
<dataType>dateTime</dataType>
<size xsi:nil="true"/>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>activityType</name>
<description>Name of Event</description>
<displayName xsi:nil="true"/>
<sourceObject>Event</sourceObject>
<dataType>string</dataType>
<size>255</size>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>true</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>mktgAssetName</name>
<description>Name of email, landing page, or object field</description>
<displayName xsi:nil="true"/>
<sourceObject>Event</sourceObject>
<dataType>string</dataType>
<size>255</size>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>activityAttributes</name>
<description>Array of name / value pairs of dynamic event attributes</description>
<displayName xsi:nil="true"/>
<sourceObject>Event</sourceObject>
<dataType>Array</dataType>
<size xsi:nil="true"/>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>campaign</name>
<description>Name of Campaign that caused the Event</description>
<displayName xsi:nil="true"/>
<sourceObject>Campaign</sourceObject>
<dataType>string</dataType>
<size>255</size>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>personName</name>
<description>Name of Lead that owns the Event</description>
<displayName xsi:nil="true"/>
<sourceObject>Lead</sourceObject>
<dataType>string</dataType>
<size>255</size>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>mktPersonId</name>
<description>Unique system id of Lead</description>
<displayName xsi:nil="true"/>
<sourceObject>Lead</sourceObject>
<dataType>integer</dataType>
<size>10</size>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>foreignSysId</name>
<description>Unique foreign system id of Lead</description>
<displayName xsi:nil="true"/>
<sourceObject>Lead</sourceObject>
<dataType>string</dataType>
<size>50</size>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>orgName</name>
<description>Name of Company associated to the Lead</description>
<displayName xsi:nil="true"/>
<sourceObject>Company</sourceObject>
<dataType>string</dataType>
<size>255</size>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
<field>
<name>foreignSysOrgId</name>
<description>Unique foreign system id of Company</description>
<displayName xsi:nil="true"/>
<sourceObject>Company</sourceObject>
<dataType>string</dataType>
<size>50</size>
<isReadonly>true</isReadonly>
<isUpdateBlocked>true</isUpdateBlocked>
<isName>false</isName>
<isPrimaryKey>false</isPrimaryKey>
<isCustom>false</isCustom>
<isDynamic>false</isDynamic>
<dynamicFieldRef xsi:nil="true"/>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</field>
</fieldList>
<updatedAt>2010-01-01T00:00:00+00:00</updatedAt>
</metadata>
</result>
</ns1:successDescribeMObject>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>