{
  "manageEntity": {
    "action": "Save",
    "entityId": "1649705346",
    "entityType": "Track",
    "nonce": "0x4a3c7a03827ef1d7ba50d3669ddacb036049e7affbeeb2cccb387a0b1ad4e10f",
    "signature": "0x3dca94f9eb30d473f65c0b28717bd74ad55f349fe16d95954084da6d4140b9531a27616b7bfbf6864f17690d5a60b7e9e7ce4431004e0c6b67002b1d7200cd791c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}