{
  "manageEntity": {
    "action": "Save",
    "entityId": "189610842",
    "entityType": "Track",
    "nonce": "0xc69f020820daa2792a4f832dfe01a84a59f8f62a59fab06109348cd36565ba4f",
    "signature": "0x8efccba13426fa63828bf85ce1181f1395beba1eb2a72ecdee5fea5ebd0844f9380cddd31d39310bf873e0e73b6e6f0cf039e4fdbcdb0156280c8e7775ea78df1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}