try {
    // we need a known Exposure type
    const { nominatorCount, own, pageCount, total } = api.registry.createType<SpStakingPagedExposureMetadata>(
      unwrapStorageType(api.registry, api.query.staking.erasStakersOverview.creator.meta.type),
      { nominatorCount: BN_ONE, own: BN_ONE, pageCount: BN_ONE, total: BN_ONE }