Creating shipment using shipmentTransactionRequests rest API

Summary:

I want to create the shipment using the shipmentTransactionRequests rest api.

If any1 has created the shipment using shipmentTransactionRequests api can you please help me with the Payload.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):

Payload :

{

    "ActionCode": "ShipmentCreate",

    "shipments": [

        {

            "Shipment": "198297",

            "ShipFromOrganizationCode": "RPCLAW",  

            "Carrier": "Customer Pickup",

            "ModeOfTransportCode": "TRUCK",

            "ServiceLevelCode": "TL_SIMULATION",

            "ShipToPartySiteNumber":"8724",

            "SoldToCustomerNumber":"8380",

            "unpackedLines": [

                {

                    "ShipmentLine": 18006,

                    "ShippedQuantity": 1,

                    "Item": "100000818",

                    "ShippedQuantityUOM": "Roll"

                   

                   

                   

                }

            ]

        }

    ]

}

Error facing is You can't use the operation POST because it isn't supported for this resource. (WSH-2460949)