{
  "manageEntity": {
    "action": "Save",
    "entityId": "592413",
    "entityType": "Track",
    "nonce": "0x454b905600d41bf4b518a294c3ebf02d1eeaf6aa0af0c6dbaa77b219f2623fb1",
    "signature": "0x4977f85d6bfacbe4ae1b5037e73a0d47230788280f017a9fc35196a4ec4aed2216d9e7b1caa6faac2dbb6ec9824840e38fbec30e39ef1660a7a69d8acfbe57711b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}