[Make.com] Uploading FILES to Noloco Via the API - blueprint example

Hi,
Thank you ! I try but “operationName” doesn’t seem to be recognized

{
"operationName": "updateProjectCollection",
"variables": {
"id": "82",
"factureVenteId": [null]
},
  "query": "mutation updateProjectCollection($id: ID!, $factureVente: [Upload!], $factureVenteId: [ID!]) { updateProjectCollection(id: $id, factureVenteId : $factureVenteId, factureVenteId: $factureVenteId) { id uuid FactureVenteId { edges { node { id uuid fileType mimetype url name __typename } __typename } __typename }}"

I have this error :

{
    "errors": [
        {
            "message": "Multipart form field \"operations\" must be a valid JSON string"
        }
    ]
}

Thank you per advance !