{
  "manageEntity": {
    "action": "Save",
    "entityId": "2079710576",
    "entityType": "Track",
    "nonce": "0xaf98fb23cfb5c33d02b0c46745e4e7d51198f07efd6ec932aa1743f3612304f1",
    "signature": "0x872ba1379890985e73d47252d14f6c1152598ef605b36dc5b27e37448cff356948fd5a3f2fd61feb1a4edef1dfb4f88dc3fecf5e970cc850f1428e2cd2617c0c1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}