{
    "version" : "2017-02-28",
    "operation" : "PutItem",
    "key": {
        "id": { "S" : "${context.arguments.id}"}
    },
    "attributeValues" : {
       "id": {  "S": "${context.arguments.id}" },
       "name": {  "S": "${context.arguments.name}" }
       #if(${context.arguments.createdAt}) ,"createdAt": { "S": "${context.arguments.createdAt}"} #end

    }
}