Add a line item to a specific section of a contract

curl --request PUT \
  --url https://www.myshop.com/apps/subscriptions/cp/api/v2/subscription-contracts-add-sectioned-line-item/{contractId} \
  --header 'Content-Type: application/json' \
  --data '
{
  "bundleUniqueId": "<string>",
  "sectionedBundleItems": [
    {
      "id": 123,
      "sectionedVariantInfos": [
        {
          "variantId": "<string>",
          "variantQty": 123
        }
      ]
    }
  ]
}
'

{}