{
  "manageEntity": {
    "action": "Save",
    "entityId": "235197",
    "entityType": "Track",
    "nonce": "0xac5adb925a1aced83d571fa24b90d2e9d38ccf1bc4e983187e895ba06eff41df",
    "signature": "0x4546ccbe9a9a8c53b7c6b1b27898211153109cad0310d29b2067d98c8e1722b52ac5deef113fbcd142251229a642b52cabaae7ee48c93401e6bfae5adc9789bb1c",
    "signer": "0x9D1c4f50C97e7dF0473F2ba9DDCc558f30C71C6f",
    "userId": "527112414"
  }
}