try {
    // we need a known Exposure type
    const { others: [{ value, who }], own, total } = api.registry.createType<SpStakingExposure>(
      unwrapStorageType(api.registry, api.query.staking.erasStakers.creator.meta.type),
      { others: [{ value: BN_ONE, who: ZERO_ACCOUNT }], own: BN_ONE, total: BN_ONE }