{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123968096",
    "entityType": "Track",
    "nonce": "0x02c8cab535752b5a1c07a33aaf24f807b37fed8a09b2078f09fc33b045c1ac3b",
    "signature": "0xd70c21fcace35ef8c2faa667ba8eaef92fe57a5a2b3b97b03c72a6b610ce767e1b53f4299a6e253a8c707b6ff47a889daffc075bab0da12b4a6ff07643519c5c1b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}