curl --request POST \
  --url https://api.getovra.com/push-subscriptions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "endpoint": "<string>",
  "keys": {
    "p256dh": "<string>",
    "auth": "<string>"
  },
  "deviceLabel": "<string>"
}
'

{
  "error": "<string>"
}