{
  "manageEntity": {
    "action": "Save",
    "entityId": "1278900455",
    "entityType": "Track",
    "nonce": "0x9724004105e69c41684a0a29500d6ed6f277d17f43beecee56f0b46a2e857254",
    "signature": "0xdcee2d642037ee4047a03ae7ee33ccb0d6520c7d445d83ec5d541060491e2c5e0bab0ec177fc3c7df6cdd19c0d4e0c2a8b8c771e9825896242bfd837d4ccf0fa1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}