curl --request POST \
  --url https://api.example.com/api/v2/vault/add \
  --header 'Content-Type: application/json' \
  --data '
{
  "entity_id": "<string>",
  "vault_id": "<string>",
  "data": {},
  "ttl": 123
}
'

{
  "entity_id": "<string>",
  "vault_id": "<string>"
}