curl --request POST \
  --url https://api.virtuoussoftware.com/api/Gift/ReversingTransaction \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "giftDate": "<dateTime>",
  "reversedGiftId": "<integer>",
  "notes": "<string>"
}
'

{
  "id": "<integer>",
  "transactionSource": "<string>",
  "transactionId": "<string>",
  "contactId": "<integer>",
  "contactName": "<string>",
  "contactUrl": "<string>",
  "giftType": "<string>",
  "giftTypeFormatted": "<string>",
  "giftDate": "<dateTime>",
  "giftDateFormatted": "<string>",
  "amount": "<double>",
  "amountFormatted": "<string>",
  "currencyCode": "<string>",
  "exchangeRate": "<decimal>",
  "baseCurrencyCode": "<string>",
  "batch": "<string>",
  "createDateTimeUtc": "<dateTime>",
  "createdByUser": "<string>",
  "modifiedDateTimeUtc": "<dateTime>",
  "modifiedByUser": "<string>",
  "segmentId": "<integer>",
  "segment": "<string>",
  "segmentCode": "<string>",
  "segmentUrl": "<string>",
  "mediaOutletId": "<integer>",
  "mediaOutlet": "<string>",
  "grantId": "<integer>",
  "grant": "<string>",
  "grantUrl": "<string>",
  "notes": "<string>",
  "tribute": "<string>",
  "tributeId": "<integer>",
  "tributeType": "<string>",
  "acknowledgeeIndividualId": "<integer>",
  "receiptDate": "<dateTime>",
  "receiptDateFormatted": "<string>",
  "contactPassthroughId": "<integer>",
  "contactPassthroughUrl": "<string>",
  "contactIndividualId": "<integer>",
  "cashAccountingCode": "<string>",
  "giftAskId": "<integer>",
  "contactMembershipId": "<integer>",
  "giftDesignations": [
    {
      "id": "<integer>",
      "projectId": "<integer>",
      "project": "<string>",
      "projectCode": "<string>",
      "externalAccountingCode": "<string>",
      "projectType": "<string>",
      "projectLocation": "<string>",
      "projectUrl": "<string>",
      "amountDesignated": "<double>",
      "display": "<string>"
    },
    {
      "id": "<integer>",
      "projectId": "<integer>",
      "project": "<string>",
      "projectCode": "<string>",
      "externalAccountingCode": "<string>",
      "projectType": "<string>",
      "projectLocation": "<string>",
      "projectUrl": "<string>",
      "amountDesignated": "<double>",
      "display": "<string>"
    }
  ],
  "giftPremiums": [
    {
      "id": "<integer>",
      "premiumId": "<integer>",
      "premium": "<string>",
      "premiumUrl": "<string>",
      "quantity": "<integer>",
      "display": "<string>"
    },
    {
      "id": "<integer>",
      "premiumId": "<integer>",
      "premium": "<string>",
      "premiumUrl": "<string>",
      "quantity": "<integer>",
      "display": "<string>"
    }
  ],
  "pledgePayments": [
    {
      "id": "<integer>",
      "expectedPaymentDate": "<dateTime>",
      "expectedAmount": "<double>",
      "giftId": "<integer>",
      "actualAmount": "<double>"
    },
    {
      "id": "<integer>",
      "expectedPaymentDate": "<dateTime>",
      "expectedAmount": "<double>",
      "giftId": "<integer>",
      "actualAmount": "<double>"
    }
  ],
  "recurringGiftPayments": [
    {
      "id": "<integer>",
      "gift": {
        "id": "<integer>",
        "contactId": "<integer>",
        "giftDate": "<dateTime>",
        "amount": "<double>"
      },
      "expectedAmount": "<double>",
      "expectedPaymentDate": "<dateTime>",
      "dismissPaymentDate": "<dateTime>",
      "fulfillPaymentDate": "<dateTime>"
    },
    {
      "id": "<integer>",
      "gift": {
        "id": "<integer>",
        "contactId": "<integer>",
        "giftDate": "<dateTime>",
        "amount": "<double>"
      },
      "expectedAmount": "<double>",
      "expectedPaymentDate": "<dateTime>",
      "dismissPaymentDate": "<dateTime>",
      "fulfillPaymentDate": "<dateTime>"
    }
  ],
  "giftUrl": "<string>",
  "isPrivate": "<boolean>",
  "isTaxDeductible": "<boolean>",
  "customFields": [
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    },
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    }
  ]
}