{
  "manageEntity": {
    "action": "Save",
    "entityId": "804078527",
    "entityType": "Track",
    "nonce": "0x089a6fd03cc8f48a5f17c213e80a7149b03694d37f185e72a28ab75cdbe920f3",
    "signature": "0xb1689928a38f1a6f1f7fcfcddcfd3b098e5f1543516022a788927cbf0af3bc250b26a27f597e3be71ebb5f24545d4eb6cff2bc08126983194f2e8c45ad2f6a271c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}