{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247758634",
    "entityType": "Track",
    "nonce": "0xd90fb83454a4f89f8a80f1257e4bb291974bd2c301dee63a308b1d8d770fb42b",
    "signature": "0x19cea93e7d333bb7ac63bea1237d96f6786bc8d2597212b5beec9ec27d3309f054933160b1a340e1446079920ae051231ca0f93163422e04e9549c2e57d74bb51c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}