Signature string
		Type      uint8
		Flags     uint8
		EcM, EcN  uint8 // Note that these will be 0/0 for non-v2 objects and older xl.meta
	}{
		VersionID: hex.EncodeToString(z.VersionID[:]),
		ModTime:   time.Unix(0, z.ModTime),
		Signature: hex.EncodeToString(z.Signature[:]),
		Type:      z.Type,
		Flags:     z.Flags,
		EcM:       z.EcM,
		EcN:       z.EcN,
	}
	return json.Marshal(tmp)
}

XL2 
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```json
{
  "Versions": [
    {
      "Type": 1,
      "V2Obj": {
        "ID": "KWUs8S+8RZq4Vp5TWy6KFg==",
        "DDir": "X3pDAFu8Rjyft7QD6t7W5g==",
        "EcAlgo": 1,
        "EcM": 2,
        "EcN": 2,
        "EcBSize": 10485760,
        "EcIndex": 3,
        "EcDist": [3, 4, 1, 2],
        "CSumAlgo": 1,
        "PartNums": [1],
        "PartETags": [""],
        "PartSizes": [314],

XL2 
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		flags |= xlFlagInlineData
	}
	var ecM, ecN uint8
	if j.Type == ObjectType && j.ObjectV2 != nil {
		ecM, ecN = uint8(j.ObjectV2.ErasureM), uint8(j.ObjectV2.ErasureN)
	}
	return xlMetaV2VersionHeader{
		VersionID: j.getVersionID(),
		ModTime:   j.getModTime().UnixNano(),
		Signature: j.getSignature(),
		Type:      j.Type,
		Flags:     flags,
		EcN:       ecN,
		EcM:       ecM,
	}
}

			return
		}
		z.Flags = xlFlags(zb0003)
	}
	z.EcN, err = dc.ReadUint8()
	if err != nil {
		err = msgp.WrapError(err, "EcN")
		return
	}
	z.EcM, err = dc.ReadUint8()
	if err != nil {
		err = msgp.WrapError(err, "EcM")
		return
	}
	return
}

// EncodeMsg implements msgp.Encodable
func (z *xlMetaV2VersionHeader) EncodeMsg(en *msgp.Writer) (err error) {

			// For tiered objects, read quorum is N/2+1 to ensure simple majority on xl.meta.
			// It is not equal to EcM because the data integrity is entrusted with the warm tier.
			// However, we never go below EcM, in case of a EcM=EcN setup.
			parities[index] = max(totalShards-(totalShards/2+1), metadata.Erasure.ParityBlocks)
		} else {
			parities[index] = metadata.Erasure.ParityBlocks
		}

				"audio/mpeg4-generic",
				"audio/ogg",
				"audio/vorbis",
				"audio/x-oggflac",
				"audio/x-oggpcm",
				"audio/opus",
				"audio/speex",
				"audio/parityfec",
				"audio/pcma",
				"audio/pcma-wb",
				"audio/pcmu-wb",
				"audio/pcmu",
				"audio/prs.sid",
				"audio/qcelp",
				"audio/red",
				"audio/rtp-enc-aescm128",
				"audio/rtp-midi",
				"audio/rtx",