{
  "manageEntity": {
    "action": "Save",
    "entityId": "485284",
    "entityType": "Track",
    "nonce": "0x66e24b019641583cf2b330ac3a79462c6e56115175ee4840aeadf20fc2a2cc4b",
    "signature": "0xbff7d0705791bbe496a1fb47c05d8defb0885acac6c19cdcfb9665fbb6b8396f2a7dd2b7f1ac549c633dde067682f5a9a5f2a9cfe3ff6da5a610d987c92e4d131b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}