Create return Input did not validate. why/what?

Hi,

I'm trying to create return for order

curl -X POST https://api.webshopapp.com/nl/returns.json \

 -u xxxx:yyyy \

 -d return[customerId]="123275635" \

 -d return[orderId]="163345685" \

 -d orderProducts[0][quantity]="1" \

 -d orderProducts[0][id]="326293755" \

 -d return[status]="new" \

 -d return[updateStock]="false" \

 -d return[notifyStatus]="false" \

 -d return[returnReason]="Return Reason" \

 -d return[returnAction]="Return Action" \

 -d return[staffNote]="Staff Note" \

 -d return[mailMessage]="Mail Message" \

 -d return[customerComment]="Customer Comment"

but I'm getting error

{"error":{"code":400,"method":"CREATE","request":"\/nl\/returns.json","message":"Input did not validate."}}

Where is problem?

Order xml

executing requestGET https://api.webshopapp.com/nl/orders.xml?number=ORD00008 HTTP/1.1

Response Code : 200

[FPAPI CONN: -1 USER: ] [MESSAGE GET ORDERS RESULT]: <?xml version="1.0" encoding="utf-8"?>

<orders>

 <order>

  <id>163345685</id>

  <createdAt>2020-09-30T12:29:43+02:00</createdAt>

  <updatedAt>2020-10-06T09:57:24+02:00</updatedAt>

  <number>ORD00008</number>

  <status>completed_shipped</status>

  <customStatusId>0</customStatusId>

.....

  <customer>

   <resource>

    <id>123275635</id>

    <url>customers/123275635</url>

        <link>https://api.webshopapp.com/nl/customers/123275635.xml</link>

   </resource>

  </customer>

 ...

  <products>

   <resource>

    <id>false</id>

    <url>orders/163345685/products</url>

        <link>https://api.webshopapp.com/nl/orders/163345685/products.xml</link>

   </resource>

  </products>

  ...

 </order>

</orders>

Products

https://api.webshopapp.com/nl/orders/163345685/products.xml

 <orderProduct>

  <id>326293756</id>

  <supplierTitle/>

  <brandTitle/>

  <productTitle>MM-SS20-1-5</productTitle>

  <variantTitle/>

  <taxRate>0.21</taxRate>

  <taxRates>

   <taxRate>

    <name>VAT</name>

    <rate>0.21</rate>

    <amount>3.4713</amount>

   </taxRate>

  </taxRates>

  <quantityOrdered>2</quantityOrdered>

  <quantityInvoiced>2</quantityInvoiced>

  <quantityShipped>2</quantityShipped>

  <quantityRefunded>0</quantityRefunded>

  <quantityReturned>0</quantityReturned>

  <articleCode/>

  <ean>6013823030035</ean>

  <sku/>

  <weight>0</weight>

  <volume>0</volume>

  <colli>0</colli>

  <sizeX>0</sizeX>

  <sizeY>0</sizeY>

  <sizeZ>0</sizeZ>

  <priceCost>0</priceCost>

  <customExcl>0</customExcl>

  <customIncl>0</customIncl>

  <basePriceExcl>8.2645</basePriceExcl>

  <basePriceIncl>10</basePriceIncl>

  <priceExcl>16.53</priceExcl>

  <priceIncl>20</priceIncl>

  <discountExcl>0</discountExcl>

  <discountIncl>0</discountIncl>

  <customFields>false</customFields>

  <product>

   <resource>

    <id>113557157</id>

    <url>products/113557157</url>

        <link>https://api.webshopapp.com/nl/products/113557157.xml</link>

   </resource>

  </product>

  <variant>

   <resource>

    <id>228612210</id>

    <url>variants/228612210</url>

        <link>https://api.webshopapp.com/nl/variants/228612210.xml</link>

   </resource>

  </variant>

 </orderProduct>

 <orderProduct>

  <id>326293755</id>

  <supplierTitle/>

  <brandTitle/>

  <productTitle>MM-HS20-1-10-100-S</productTitle>

  <variantTitle/>

  <taxRate>0.21</taxRate>

  <taxRates>

   <taxRate>

    <name>VAT</name>

    <rate>0.21</rate>

    <amount>1.3881</amount>

   </taxRate>

  </taxRates>

  <quantityOrdered>2</quantityOrdered>

  <quantityInvoiced>2</quantityInvoiced>

  <quantityShipped>2</quantityShipped>

  <quantityRefunded>0</quantityRefunded>

  <quantityReturned>0</quantityReturned>

  <articleCode/>

  <ean>6013823187135</ean>

  <sku/>

  <weight>0</weight>

  <volume>0</volume>

  <colli>0</colli>

  <sizeX>0</sizeX>

  <sizeY>0</sizeY>

  <sizeZ>0</sizeZ>

  <priceCost>0</priceCost>

  <customExcl>0</customExcl>

  <customIncl>0</customIncl>

  <basePriceExcl>3.3058</basePriceExcl>

  <basePriceIncl>4</basePriceIncl>

  <priceExcl>6.61</priceExcl>

  <priceIncl>8</priceIncl>

  <discountExcl>0</discountExcl>

  <discountIncl>0</discountIncl>

  <customFields>false</customFields>

  <product>

   <resource>

    <id>113708456</id>

    <url>products/113708456</url>

        <link>https://api.webshopapp.com/nl/products/113708456.xml</link>

   </resource>

  </product>

  <variant>

   <resource>

    <id>228825525</id>

    <url>variants/228825525</url>

        <link>https://api.webshopapp.com/nl/variants/228825525.xml</link>

   </resource>

  </variant>

 </orderProduct>

</orderProducts>