{
  "manageEntity": {
    "action": "Save",
    "entityId": "930253648",
    "entityType": "Track",
    "nonce": "0x910564c21340ae37ec74771cfa557b92b4d2013b2887bee53b97f8641dc939f9",
    "signature": "0x7ddf5506b8882270967bd1441dd72697fea9eadffbc4e0f02cbf123efe28729e4a6623ec1df8d65fb462c2d903b704c94526b3f7e5dab45378990ea61b963b171c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}