Monitor your delete task to verify it completes. 

The possible states of a task are:

NOT_STARTEDScheduled but not started.
IN_PROGRESSCurrently running.
COMPLETEDone, either successfully or not.
CANCELLINGCancellation has begun but not yet complete.
CANCELLEDCancellation complete and any changes are rolled back.

AnaplanAuthToken:{token}Your Anaplan authentication token value.
workspaceIDThe workspace ID
modelIDThe model ID
actionIDThe ID for the delete action.
taskIDThe delete action task ID.

curl -X GET \ \ -H 'authorization: AnaplanAuthToken {token}}' \ -H "Content-Type:application/json"