How to create order to terminate one out of 5 covered assets from a coverage item using REST API

We have a requirement to create a sales order to terminate specific covered asset/s from a coverage item within a subscription. We have the basic REST API payload to terminate entire coverage product within a subscription. However, terminating specific covered asset/s from a coverage product using sales order is something we're not aware of yet.

Sample Scenario:

//Source Order & Subscription Details:

Sample Order# - 1001

Sample Sub# [Id]- SUB-1001 [111xxx]

Sample Coverage Product [Id] - Ext. Warr [222xxx]

Covered Asset#/Id (covered by Ext. Warr) - 333xxx, 444xxx, 555xxx

Now, consider customer wants to make amendments to terminate one or two covered assets by creating sales orders in OM.