curl --request PUT \
  --url https://identity-sandbox.payven.com.tr/api/v1/permissions/grants \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json; ver=1.0' \
  --data '
{
  "tenant_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "feature_code": "<string>",
  "grants": [
    {
      "permission_name": "<string>",
      "granted_roles": [
        "<string>"
      ]
    }
  ]
}
'

{
  "added": 123,
  "removed": 123,
  "unchanged": 123
}