{
  "manageEntity": {
    "action": "Save",
    "entityId": "113899",
    "entityType": "Track",
    "nonce": "0x61750b129c8dbc10a665f52879b2a699f47baef6076e05cc8237209297d1c1cf",
    "signature": "0xf65e1332fc06fa2640c48eccea3889dea444f4081efaa30bc9592e1495c9a88a51c18c8748de55ff71158299bb5ccc37b635e5953f64cb525630ca060902b0351b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}