Hi,
Thank you for reaching out.
The conversion_last_received_request_date_time returns the date and time, and should return a timestamp format value.
The call duration should be returned via the
phone_call_duration_seconds attribute and you can further identify using the
type attribute.
As for the trackingCodeType, this is available in the
TagSnippet object. For more information on this, you may refer to this
section of our conversion actions guide.
Best regards,
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| Peter Laurence Napa Oliquino |
| Google Ads API Team |
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