mutation SetMarketplaceOfferMinQuantity($request: SetMarketplaceOfferMinQuantityCommandRequestInput!) {
  SetMarketplaceOfferMinQuantity(request: $request)
}

{
  "request": {
    "offerKeys": [
      "id"
    ],
    "minQuantity": "value"
  }
}

{
  "data": {
    "SetMarketplaceOfferMinQuantity": true
  }
}