{
  "manageEntity": {
    "action": "Save",
    "entityId": "542115954",
    "entityType": "Track",
    "nonce": "0x78e134e457746f691841ad2b41206f9bba90020a418f5219ee11f57533121830",
    "signature": "0x074d3f059eb468203fe0e1077a0f21dd6ce5e4da35e3ad6e8c44c2e3c948c4c84cc66e06a71a28cc7c3b519cdc363533e49e6ecc83bf1caf1e62184f2914494d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}