Not able to figure out RelationshipRecId field for /accounts/{PartyNumber}/child/Relationship

Summary

Not able to figure out RelationshipRecId field for /accounts/{PartyNumber}/child/Relationship

Content

Below is the path to get a Relationship as per the oracle documentation:

/crmCommonApi/resources/11.1.11/accounts/{PartyNumber}/child/Relationship/{RelationshipRecId}

https://docs.oracle.com/cloud/latest/salescs_gs/FAAPS/op-crmCommonApi-resources-11.1.11-accounts-{PartyNumber}-child-Relationship-{RelationshipRecId}-get.html

Following URI we used to get relationship for the account

https://ucf1-fap1785-crm.oracledemos.com:443/crmCommonApi/resources/11.1.10/accounts/64901/child/Relationship/100000000396478

So if we go with documentation, the value 100000000396478 should be the RelationshipRecId. Although the json response we recieved for this URI call, we did not find any json element with name RelationshipRecId. Please update which json field to map for RelationshipRecId.