Working with the DynamoDB API - DynamoDB Applied Design Patterns - page 149

DeleteItem
The following code will delete the item whose BookTitle is SCJP and Author is
Kathy . The response to this request will display the deleted item's attributes and values.
{
"TableName": "Tbl_Book",
"Key": {"BookTitle": { "S": "SCJP" },"Author": { "S":
"Kathy" } },
"ReturnValues": "ALL_OLD"
}