curl --request POST \
  --url https://universal.rollout.com/api/oauth/authorize-url \
  --header 'Content-Type: application/json' \
  --data '
{
  "appKey": "<string>",
  "plan": "<string>",
  "customParams": {},
  "entitiesToSync": {
    "appointments": true,
    "borrowers": true,
    "calls": true,
    "calendars": true,
    "calendarEvents": true,
    "customFields": true,
    "events": true,
    "lists": true,
    "loans": true,
    "notes": true,
    "offices": true,
    "properties": true,
    "smartLists": true,
    "tasks": true,
    "taskTemplates": true,
    "teams": true,
    "textMessages": true,
    "emailMessages": true,
    "appointmentOutcomes": true,
    "appointmentTypes": true,
    "stages": true,
    "emailThreads": true,
    "documents": true,
    "sources": true,
    "timeframes": true,
    "ponds": true
  },
  "returnURI": "<string>"
}
'

{
  "url": "<string>",
  "requestId": "<string>"
}