{
  "manageEntity": {
    "action": "Save",
    "entityId": "845210230",
    "entityType": "Track",
    "nonce": "0x3e4d2ef545f8c9f8568760dfad7028e9c62097d56f36e3c39f052f2a825cfabc",
    "signature": "0x30ad0b9b7126e43a04ec4a045c57609b312455314c81da79543cf586bb5930e95adc9332f94dbd71dc0ec34f4cebf45f8a0eee7a30aa21f823529705fcbdcc4d1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}