{
  "manageEntity": {
    "action": "Save",
    "entityId": "49853566",
    "entityType": "Track",
    "nonce": "0x3db02dad90a4229f28177f586f137bcb7b3689f72b8469d2640e5a632d310c39",
    "signature": "0xd460f665a7f785285e8d90ca559e4325df9e58b04d13069b69c4b43cd23393ea1441ca78c2d93ad4ea57ebb4548114a6783b7674ecf5196cfaca9ba19ec86f061b",
    "signer": "0x9749228070Ea63D35C2Aa8F65344ced72153Badf",
    "userId": "354947534"
  }
}