{
  "manageEntity": {
    "action": "Save",
    "entityId": "1881434006",
    "entityType": "Track",
    "nonce": "0xcd3ae86d0639fc01f42956db84c47a0fb5a77e96f1ef852a7ecae899a5275eb6",
    "signature": "0xcaac5d4e23d7bfea95bf63c9886dc6e69a03dcf124988de5bed28652c54675fd75b96bbc3c1f0178f3064e68cc8cb206d5b8b3427038069119bd53cd78296a5c1b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}