{
  "manageEntity": {
    "action": "Save",
    "entityId": "897068963",
    "entityType": "Track",
    "nonce": "0x9d2cd230a93335c0bae12f0c4e4e8a3bd9f758ba1d62a0f0185db26a6fc5036e",
    "signature": "0xc64fbfeabc7f451f2c73811cc6ff9c7c7b919215fe673c5b0833571b95b5dc0e21c385a06a2f27c6c0ee98547499aa3b7e8866efcb78d1a9e8885691789203651c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}