shopify_api/test/fixtures/payment.json

{
  "payment" : {
    "id": "east-44a400ef20b36e38f10b882cb7260796",
    "amount": 10.00,
    "session_id": "east-44a400ef20b36e38f10b882cb7260796",
    "unique_token": "my-client-generated-idempotency-token"
  }
}