curl --request GET \
  --url https://api.sumvin.com/v0/safe/rpc/{user_op_hash}/status

{
  "_links": {
    "self": {
      "href": "<string>",
      "method": "GET",
      "templated": false,
      "description": "<string>"
    }
  },
  "user_op_hash": "<string>",
  "status": "<string>",
  "txn_hash": "<string>"
}