var info checksumInfoJSON
	json := jsoniter.ConfigCompatibleWithStandardLibrary
	if err := json.Unmarshal(data, &info); err != nil {
		return err
	}
	sum, err := hex.DecodeString(info.Hash)
	if err != nil {
		return err
	}
	c.Algorithm = BitrotAlgorithmFromString(info.Algorithm)
	c.Hash = sum
	if _, err = fmt.Sscanf(info.Name, "part.%d", &c.PartNumber); err != nil {
		return err

	pt, ptok := jwtClaims.Lookup(iamPolicyClaimNameSA())
	sp, spok := jwtClaims.Lookup(policy.SessionPolicyName)
	if ptok && spok && pt == embeddedPolicyType {
		policyBytes, err := base64.StdEncoding.DecodeString(sp)
		if err != nil {
			return UserIdentity{}, nil, err
		}
		embeddedPolicy, err = policy.ParseConfig(bytes.NewReader(policyBytes))
		if err != nil {
			return UserIdentity{}, nil, err
		}
	}

		fi.VersionID = mustGetUUID()
	}

	fi.DataDir = mustGetUUID()
	if ckSum := userDefined[ReplicationSsecChecksumHeader]; ckSum != "" {
		if v, err := base64.StdEncoding.DecodeString(ckSum); err == nil {
			fi.Checksum = v
		}
		delete(userDefined, ReplicationSsecChecksumHeader)
	}
	uniqueID := mustGetUUID()
	tempObj := uniqueID

	// Initialize erasure metadata.