curl --request POST \
  --url https://api.sumvin.com/v0/pint/exchange \
  --header 'Content-Type: application/json' \
  --data '
{
  "pint": {
    "wallet": "<string>",
    "nonce": 123,
    "statement": "<string>",
    "scopes": [
      "<string>"
    ],
    "resources": [
      "<string>"
    ],
    "max_amount": "<string>",
    "max_amount_token": "<string>",
    "expires_at": 123
  },
  "signature": "<string>",
  "audience": "<string>",
  "source_chat_message_id": 12345
}
'

{
  "_links": {},
  "sig": "<string>",
  "id": "<string>",
  "audience": "<string>",
  "scopes": [
    "<string>"
  ],
  "expires_at": 123,
  "sri": "<string>"
}