{
  "manageEntity": {
    "action": "Save",
    "entityId": "293480781",
    "entityType": "Track",
    "nonce": "0xb1f019431b1e2e5c4860543ef67c5b1cb0716b3adc325f4fbc074a4bd11d75f3",
    "signature": "0x294da67b7162f369d0807e1befb6629852380b26208caa5fcd94dfb3493911911ca5017faba2a90f5708ecba96bf6325b60612ec871828c0e9c2984a10d42ef71c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}