{
  "manageEntity": {
    "action": "Save",
    "entityId": "31042715",
    "entityType": "Track",
    "nonce": "0xce7cad5eeeed6ac01d48348295d39524cf8d66d22c4dfff2b8d48d08eb2b5f0e",
    "signature": "0xc6210275960af26cf0d439980f0c02f0230b106622c0fe0bbac6e92a002414b362354683e18e763ec0c87c736c92553cadaec33d5ec602de6cc25c8dd78fd11c1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}