curl --request POST \
  --url https://api.{your-broker}.slate-labs.com/customers/me/deposit

{
  "transaction_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "gateway": "<string>",
  "gateway_type": "<string>",
  "currency": "<string>",
  "cashier_token": "<string>",
  "cashier_session_id": "<string>",
  "cashier_key": "<string>",
  "script_url": "<string>",
  "cashier_url": "<string>",
  "cashier_id": "<string>",
  "redirect_url": "<string>"
}