curl --request PUT \
  --url https://api.virtuoussoftware.com/api/Premium/{premiumId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "code": "<string>",
  "price": "<double>",
  "fairMarketValue": "<double>",
  "description": "<string>",
  "cost": "<double>",
  "inventoryCount": "<integer>",
  "isActive": "<boolean>",
  "customFields": [
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    },
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    }
  ]
}
'

{
  "id": "<integer>",
  "name": "<string>",
  "code": "<string>",
  "description": "<string>",
  "price": "<double>",
  "fairMarketValue": "<double>",
  "cost": "<double>",
  "inventoryCount": "<integer>",
  "isActive": "<boolean>",
  "createDateTimeUtc": "<dateTime>",
  "createdByUser": "<string>",
  "modifiedDateTimeUtc": "<dateTime>",
  "modifiedByUser": "<string>",
  "customFields": [
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    },
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    }
  ]
}