{
  "manageEntity": {
    "action": "Save",
    "entityId": "1805747820",
    "entityType": "Track",
    "nonce": "0xc3cb3e9cb325cb0e96010d9c1c597b46bc733ea92f3cff5f2b2c701d77c7c2bb",
    "signature": "0x8fe09a97e3680af90f39d9c6d710cee8e74f527a3db2d181953d1a3f92f46d462de6f84d292c5ffcdd47ff00c562be947d0720fdfc21041ced35de4bf5eda47b1b",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}