How inser records to LinkingModule from api ? (error 4600)

I created api for all modules what i have in zoho crm, but when i insert xmlData to LinkingModule i got error - 4600.

How its fix?

Thanks

My post param -

"authtoken" => "authtoken" // changed
"scope" => "crmapi"
"xmlData => "<LinkingModule3>

<row no="1">

<FL val="Message ID">815993073</FL>

<FL val="Created By">Lookup</FL>

<FL val="Contacts Messages Owner">Lookup</FL>

<FL val="CONTACTID">2722691000000268879</FL>

<FL val="Created Time">2017-10-10 09:10:59</FL>

<FL val="Modified By">2017-10-10 09:10:59</FL>

<FL val="Modified Time">2017-10-10 09:10:59</FL>

<FL val="Processed">true</FL>

<FL val="Accepted">true</FL>

<FL val="Texts">2722691000000263003</FL>

</row>

</LinkingModule3>"