Graphql upsert with condition

Question

i'm trying to create a simple leaderboard table, i would like to execute a query to insert or update entry if the new score is higher than the previous one, is it possible to achieve this using graphql ? My upsert mutation look like this

mutation addEntry {
  upsertRankentry(
    upsert: {
      create: {id: "111", score: 125110},
      update: {id: "111", score: 125110}}
    where: {id: "111"}
  ) {
    id
  }
}

edit : I'm using graphCMS to generate my API and i use it in a javascript app with fetch()