{
  "manageEntity": {
    "action": "Save",
    "entityId": "2081462054",
    "entityType": "Track",
    "nonce": "0x0f7d3c689bdf71859a7f2064261329aab8d8237602303ab5b20f5b8459291702",
    "signature": "0x1601d6fe9f57afd906ce34b6bd15258ea79d2d49551c0137e81570713fb681e0408a26d386bf8e74e0318cb37cc6c4e1b353cdad10266f8ac55c519c354651aa1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}