Fields of the chosen calculator (French field names, amounts in euros, dates YYYY-MM-DD; a "?" means optional). If a field is missing or wrong, the run returns an item with "expectedParams" and an "example", and nothing is charged. Fields per calculator: salary-gross-to-net: {brutMensuel, statut, tauxPas?, tempsPlein?} ; salary-net-to-gross: {netMensuel, statut, cible, tauxPas?} ; income-tax: {revenuNetImposable, conjoint?, enfants?, enfantsHandicap?, parentIsole?, invalidite?} ; notary-fees: {prix, type, dmtoRate?} ; severance-pay: {salaireMensuel, ancienneteAnnees, ancienneteMois?, motif?} ; conventional-termination: {salaireReference, ancienneteAnnees, ancienneteMois?} ; retirement-severance: {salaireMensuel, ancienneteAnnees, ancienneteMois?, type} ; fixed-term-end-bonus: {mode?, brutTotal?, salaireMensuel?, dureeMois?, taux?} ; mileage-allowance: {km, cv, typeVehicule?, electrique?} ; vat: {montant, taux, sens?} ; vehicle-registration-tax: {regionId, chevauxFiscaux, plus10ans?, electrique?, malus?} ; ecological-malus: {co2, masse, energie, enfants?} ; car-import-cost: {provenance, vendeur, prix, datePremiere, dateFrance?, kilometrage, energie, co2, masse, chevauxFiscaux, regionId, droitsReduits?, transport?, plaquesAssurance?, coc?, controleTechnique?, fraisDossier?} ; driving-licence-points: {probatoire?, infractions, stages?, aujourdhui?}