{
  "manageEntity": {
    "action": "Save",
    "entityId": "1284757872",
    "entityType": "Track",
    "nonce": "0x94e406bd504a777aa2af9350f41db757eb189c3855dc3b86c6946447913b23d4",
    "signature": "0x748264577f523dcca8a1916ac24e2d497c1d3b05175f6169af57ef4ac5d613125fe64b18a21e5cd7d4f1d151123fde18b51816b866e25fcc69793db34aab88211c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}