curl --request POST \
  --url https://api.enterprise.sandbox.uphold.com/core/transactions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "quoteId": "623000c8-9bdf-4a2b-aa3d-6a6b44a7f6a0",
  "metadata": {
    "externalId": 123
  }
}
'

{
  "transaction": {
    "id": "623000c8-9bdf-4a2b-aa3d-6a6b44a7f6a0",
    "origin": {
      "amount": "100.00",
      "asset": "GBP",
      "rate": "47619.04761904762",
      "node": {
        "type": "account",
        "id": "b98e4f0d-a67d-4126-a99d-666f7e0315d9",
        "ownerId": "e4ce04dc-67b7-4e9f-af91-482cb6f9fc4a"
      }
    },
    "destination": {
      "amount": "0.0021",
      "asset": "BTC",
      "rate": "0.000021",
      "node": {
        "type": "account",
        "id": "555a99a1-620d-4431-a0ac-b43e1aad2bdc",
        "ownerId": "e4ce04dc-67b7-4e9f-af91-482cb6f9fc4a"
      }
    },
    "denomination": {
      "amount": "100.00",
      "asset": "GBP",
      "target": "origin",
      "rate": "1"
    },
    "fees": [],
    "status": "processing",
    "quotedAt": "2024-07-24T15:02:39.000Z",
    "createdAt": "2024-07-24T15:22:39.000Z",
    "updatedAt": "2024-07-24T15:32:39.000Z"
  }
}