REST Service for Item EFF

Summary

unable to get it working

Content

Can some one help with below payload to make it working. I am creating Item EFF.

My URL is 
{{ServerName}}/fscmRestApi/resources/11.13.18.05/itemsV2/00040000000EACED00057708000110D9353E29690000000EACED00057708000110D9319188D20000000EACED00057708000110D9353E29690000000EACED00057708000110D9319188D2/child/ItemEffCategory

My Body:

{

"OrganizationCode": "INSPINV",

    "ItemClass": "Root Item Class",

    "ItemNumber": "AA1",

    "ItemDescription": "test",

 

    "ItemEffCategory": [

{

 

    "CategoryCode": "ROOT_ICC",

    "items": [

        {

          "ContextCode": "AA_EFF",

          "CategoryCode": "ROOT_ICC",

          "eff1": " iu1",

          "eff2": " iu2"

        }

            ]

    }   

                    ]

}

Result:

{
    "title": "Bad Request",
    "status": "400",
    "o:errorDetails": [
        {
            "detail": "Invalid attribute \"OrganizationCode\" in the payload.",
            "o:errorCode": "27511"
        }
    ]
}