{
  "manageEntity": {
    "action": "Save",
    "entityId": "920114878",
    "entityType": "Track",
    "nonce": "0xbd9eb57b7f52a9c9c1a583d7af91cd3104c4b85f98044537805cff8f8100627e",
    "signature": "0xfca53b19562b15b0698cefd8064ffdf6e29c950ef7a19b1fea47ad286e7b7c2e2c3426c51f0ab05d7410e3706d22ecaaec82d5cbd60d97e89c9a727556db86d41b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}