{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216436844",
    "entityType": "Track",
    "nonce": "0xd4a6b0e8fdc4834159306c647c39051aea8d21a6e3eebf7ef692e0c13fd0aeac",
    "signature": "0xbd11e1d9f17e2babaf48c90d588c7bdc9a98c1ca4bc9a477cd6749773f36a03a7b81579672319fb73e029dc9c6bdce003f656fcb8feb40c22c7185fb411e370c1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}