curl --request POST \
  --url http://34.170.194.254:8000/api/v1/loans/{loan_ref}/collateral-agreements \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "collateral_agreement_ref": "<string>",
  "assets": [
    {
      "asset_ref": "<string>",
      "quantity": 123
    }
  ],
  "custody_partner_code": "<string>",
  "consent_timestamp": "2023-11-07T05:31:56Z",
  "agreement_reference": "<string>",
  "loan_principal_amount": 123,
  "principal_currency": "<string>",
  "origination_price": 123,
  "origination_price_timestamp": "2023-11-07T05:31:56Z",
  "initial_ltv": 123,
  "liquidation_ltv_threshold": 123,
  "reuse_permission_flag": false,
  "enforcement_permissions": {},
  "contract_terms": {},
  "idempotency_key": "<string>"
}
'

{
  "collateral_agreement_ref": "<string>",
  "loan_ref": "<string>",
  "created_at": "2023-11-07T05:31:56Z"
}