Request Headers:
Content Type: application/json
Ocp-Apim-Subscription-Key: ********************
Authorization: Bearer *********************
Request Body
{
  "Availability_Request": {
      "partnerKey": "[PARTNERKEY]",
      "countryCode": "NL",
      "products": [
        {
          "productNumber": "C9200L-48T",
          "longProductNumber": "C9200L-48T"
        }]
    }
}