curl --request POST \
  --url https://tars.loopscale.com/v1/markets/creditbook/collateral/withdraw \
  --header 'Content-Type: application/json' \
  --header 'user-wallet: <user-wallet>' \
  --data '
{
  "loan": "<string>",
  "collateralMint": "<string>",
  "amount": 123,
  "collateralIndex": 123,
  "expectedLoanValues": {
    "expectedApy": 123,
    "expectedLqt": [
      123
    ]
  },
  "assetIndexGuidance": [
    123
  ]
}
'

{
  "message": "<string>",
  "signatures": [
    {
      "publicKey": "<string>",
      "signature": "<string>"
    }
  ]
}