curl --request POST \
  --url https://backstage.example.com/api/soundcheck/checks/exemptions \
  --header 'Content-Type: application/json' \
  --data '
{
  "checkId": "<string>",
  "entityRef": "<string>",
  "justification": "<string>"
}
'

{
  "exemption": {
    "checkId": "<string>",
    "entityRef": "<string>",
    "userRef": "<string>",
    "justification": "<string>",
    "timestamp": "<string>"
  }
}