Can I add fields in related search (API POST search) - API Version 11

Hi,

I use the API /<module>/filter POST to retrieve Leads and Contacts by ProspectList

https://support.sugarcrm.com/Documentation/Sugar_Developer/Sugar_Developer_Guide_10.0/Integration/Web_Services/REST_API/Endpoints/modulefilter_POST/

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$searchParams = [
'filter' => [
['list_type' => ['$equals' => 'unique_campaign']],
['campaigns.id' => ['$in' => $campaignList]],
],
'max_num' => 100,
'offset' => 0,
'fields' => [
'id',
'name',
'n2g_id',
'campaigns',
'contacts',
'leads',
]
];
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

The result is like this:

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'id' => '51545936-33d2-11eb-8063-005056b0b4f5',
'name' => 'Teilnehmer mit Touchpoint - CloudExpo_Webinar 2_202012',
'date_modified' => '2021-10-13 10:05:21',
'contacts' =>
(object) array(
'next_offset' => -1,
'records' =>
array (
0 =>
(object) array(
'id' => '4559cae7-74b9-596b-0be2-56b5035b75cb',
'date_modified' => '2021-11-18 16:47:49',
'_acl' =>
(object) array(
'fields' =>
(object) array(
),
),
'_module' => 'Contacts',
),
...
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

I need for my process the field mkto_id and don't want additional API calls. Is there a way to add the fields leads.mkto_id and contacts.mkto_id to this result?

Regards
Harry