{
  "manageEntity": {
    "action": "Save",
    "entityId": "964636",
    "entityType": "Track",
    "nonce": "0xa5145058f7f51ea855b6318110d31d6acb0cf36da5274c311dda7c4d405ade35",
    "signature": "0xc0dd9f7c4d88a886c41a4ab913c012d9a474417cb4377081f817fda9b43896df0553b93332d7b3445f68e64a2a72010c82676f05b81d478c7142be397523f0a21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}