{
  "manageEntity": {
    "action": "Save",
    "entityId": "395517135",
    "entityType": "Track",
    "nonce": "0xef2ee08de2c254b7ee12f6679db112ebfb0274525dd443b0c5c5bd19328b8339",
    "signature": "0x3d54235203bbec9b7c0f1bb8a4739178c6a10862bcaec09b95a1d854e657082668e78d942dcf6e2570d351c7dff7fb7dcdf42df501b439681673968e4899df611c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}