{
  "manageEntity": {
    "action": "Save",
    "entityId": "1305014553",
    "entityType": "Track",
    "nonce": "0xf83bc0324fa83038d4bcea39b8a8579be692830d76b34e1bb491f45f12777e09",
    "signature": "0x69928e1a65df9052caa55cb5d2a1abad0bfd29ca9b451289dee7eea7c294d4c6761d24a85bb817a21612a0dca7b5764ec20ecf3e86e625b11c5b05aa91ccec691c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}