{
    "version" : "2017-02-28",
    "operation" : "PutItem",
    "key" : {
        "shopID": $util.dynamodb.toDynamoDBJson($ctx.args.shopID),
        "vendorID": $util.dynamodb.toDynamoDBJson($ctx.args.vendorID)
    },
    "attributeValues": {
        "name": $util.dynamodb.toDynamoDBJson($ctx.args.name)
    },
    ## ADD NEW ITEM IF SHOP ID AND VENDOR ID NOT YET EXIST
    "condition": {
    	"expression": "attribute_not_exists(shopID) AND attribute_not_exists(vendorID)"
    }
}