Update Product Assortment

String DEFAULT_JOBNAME = 'Update';
Integer DEFAULT_JOBTHREADS = 1;
String DEFAULT_BATCHCHAIN = 'Assortment';
String DEFAULT_BATCHCHAINTYPE = 'paapla';

Id assortmentId = 'assortmentId1';
List<Map<String, Object>> papList = new List<Map<String, Object>>();
Set<Id> accountIds = new Set<Id>();

Assortment productAssortment = [
    SELECT Id, cgcloud__Sales_Org__c, cgcloud__Valid_From__c, cgcloud__Valid_Thru__c, cgcloud__Version__c
    FROM Assortment
    WHERE Id = :assortmentId
    LIMIT 1
];

for (AssortmentProduct pap : [SELECT ProductId, cgcloud__Valid_From__c, cgcloud__Valid_Thru__c FROM AssortmentProduct where AssortmentId =: assortmentId]) {
    papList.add(
        new Map<String, Object>{
            'sfid' => pap.ProductId,
            'validfrom' => Datetime.newInstanceGmt(pap.cgcloud__Valid_From__c.year(), pap.cgcloud__Valid_From__c.month(), pap.cgcloud__Valid_From__c.day()).getTime(),
            'validthru' => Datetime.newInstanceGmt(pap.cgcloud__Valid_Thru__c.year(), pap.cgcloud__Valid_Thru__c.month(), pap.cgcloud__Valid_Thru__c.day()).getTime()
        }
    );
}
    
for (
    StoreAssortment customerProductAssortment :  [
    SELECT Id, AccountId
    FROM StoreAssortment
    WHERE AssortmentId = :assortmentId
]
) {
    accountIds.add(customerProductAssortment.AccountId);
}


String payload = JSON.serialize(
    new Map<String, Object> {
        'accountsfids' => accountIds,
        'validfrom' => Datetime.newInstanceGmt(productAssortment.cgcloud__Valid_From__c.year(), productAssortment.cgcloud__Valid_From__c.month(), productAssortment.cgcloud__Valid_From__c.day()).getTime(),
        'validthru' => Datetime.newInstanceGmt(productAssortment.cgcloud__Valid_Thru__c.year(), productAssortment.cgcloud__Valid_Thru__c.month(), productAssortment.cgcloud__Valid_Thru__c.day()).getTime(),
        'version' => productAssortment.cgcloud__Version__c,
        'salesorg' => productAssortment.cgcloud__Sales_Org__c,
        'products' => papList,
        'jobname' => DEFAULT_JOBNAME,
        'jobthreads' => DEFAULT_JOBTHREADS,
        'batchchain' => DEFAULT_BATCHCHAIN,
        'batchchaintype' => DEFAULT_BATCHCHAINTYPE
    }
);

<namespace>.OffplatformCallout request = new <namespace>.OffplatformCallout('UPDATE_PRODUCT_ASSORTMENT', productAssortment.cgcloud__Sales_Org__c);
<namespace>.OffPlatformCalloutResponse response = request.execute(
    <namespace>.TransactionHandler.getTransactionIdentifier(),
    new Map<String, String>{'productassortmentid' => assortmentId},
    payload
);

System.debug(response.status);