Send the list of the records that you want to unmerge from the consolidated record in the request body. Use the xref row ID or the source system and the source key to specify the records.
Use the Read Record API to get the xref rowId of the record to unmerge. The following sample request retrieves the XREF metadata of a record:
GET http://localhost:8080/cmx/cs/localhost-orcl-DS_UI1/Person/2638243?contentMetadata=XREF