curl --request PUT \
  --url https://api.virtuoussoftware.com/api/VolunteerOpportunity/{volunteerOpportunityId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "startDateTime": "<dateTime>",
  "endDateTime": "<dateTime>",
  "timeZone": "<string>",
  "preferredNumberOfHours": "<double>",
  "projectId": "<integer>",
  "locationName": "<string>",
  "description": "<string>",
  "isActive": "<boolean>",
  "isLocalOnly": "<boolean>",
  "address1": "<string>",
  "address2": "<string>",
  "city": "<string>",
  "state": "<string>",
  "postal": "<string>",
  "country": "<string>",
  "preferredDateTime": "<dateTime>",
  "currentPriority": "<string>",
  "currentNeed": "<integer>",
  "customFields": [
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    },
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    }
  ]
}
'

{
  "id": "<integer>",
  "volunteerOpportunityUrl": "<string>",
  "name": "<string>",
  "locationName": "<string>",
  "displayAddress": "<string>",
  "startDateTime": "<string>",
  "endDateTime": "<string>",
  "preferredDateTime": "<string>",
  "timeZone": "<string>",
  "description": "<string>",
  "createDateTimeUtc": "<dateTime>",
  "createdByUser": "<string>",
  "modifiedDateTimeUtc": "<dateTime>",
  "modifiedByUser": "<string>",
  "isActive": "<boolean>",
  "isLocalOnly": "<boolean>",
  "preferredNumberOfHours": "<double>",
  "projectId": "<integer>",
  "totalVolunteers": "<integer>",
  "totalVolunteerHours": "<double>",
  "volunteerOrganizers": [
    {
      "id": "<integer>",
      "volunteerOrganizerUrl": "<string>",
      "contactId": "<integer>",
      "displayName": "<string>",
      "firstName": "<string>",
      "avatarUrl": "<string>",
      "primaryPhone": "<string>",
      "primaryEmail": "<string>",
      "contactUrl": "<string>",
      "volunteerOpportunityUrl": "<string>"
    },
    {
      "id": "<integer>",
      "volunteerOrganizerUrl": "<string>",
      "contactId": "<integer>",
      "displayName": "<string>",
      "firstName": "<string>",
      "avatarUrl": "<string>",
      "primaryPhone": "<string>",
      "primaryEmail": "<string>",
      "contactUrl": "<string>",
      "volunteerOpportunityUrl": "<string>"
    }
  ],
  "currentNeed": "<integer>",
  "currentPriority": "<string>",
  "currentPriorityName": "<string>",
  "currentNeedFilledPercentage": "<double>",
  "hoursFilledPercentage": "<double>",
  "volunteerOrganizersUrl": "<string>",
  "volunteersUrl": "<string>",
  "customFields": [
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    },
    {
      "name": "<string>",
      "value": "<string>",
      "displayName": "<string>"
    }
  ]
}