curl --request POST \
  --url https://api.anchorage-staging.com/v2/collateral_management/packages \
  --header 'Api-Access-Key: <api-key>' \
  --header 'Api-Signature: <api-signature>' \
  --header 'Api-Timestamp: <api-timestamp>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "collateralAssetsConfig": [
    {
      "asset": {
        "assetType": "<string>"
      },
      "liquidationPriority": 123,
      "weight": "<string>",
      "maxStalenessMinutes": 123,
      "notes": "<string>"
    }
  ],
  "pledgorId": "<string>",
  "securedPartyId": "<string>",
  "clientReferenceId": "<string>",
  "ltvRoundingPrecision": 123
}
'

{
  "packageId": "<string>"
}