How to use the @requestnetwork/utils.signature function in @requestnetwork/utils

function getSignerIdentityFromAction(action: RequestLogicTypes.IAction): IdentityTypes.IIdentity {
  return Utils.signature.recover(action);
}

sign: (data: any, identity: IdentityTypes.IIdentity): any =>
      ({
        [aliceRaw.identity.value as string]: Utils.signature.sign(data, aliceRaw.signatureParams),
        [bobRaw.identity.value as string]: Utils.signature.sign(data, bobRaw.signatureParams),
      }[identity.value]),
    supportedIdentityTypes: [IdentityTypes.TYPE.ETHEREUM_ADDRESS],

function getSignerIdentityFromTransaction(
  transaction: Types.IRequestLogicTransaction,
): IdentityTypes.IIdentity {
  return Utils.signature.recover(
    Utils.crypto.normalizeKeccak256Hash(transaction.data),
    transaction.signature,
  );
}

sign: (data: any, identity: IdentityTypes.IIdentity): any =>
      ({
        [aliceRaw.identity.value as string]: Utils.signature.sign(data, aliceRaw.signatureParams),
        [bobRaw.identity.value as string]: Utils.signature.sign(data, bobRaw.signatureParams),
      }[identity.value]),
    supportedIdentityTypes: [IdentityTypes.TYPE.ETHEREUM_ADDRESS],