{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544563804",
    "entityType": "Track",
    "nonce": "0x035b21159f5fbc94b8ddbb9d6332edc52db2dd174275153dc62f562b490ee97a",
    "signature": "0xab8bb8dd9ac48e99fbeb440c5bbeebd50fe5bc36e533660352ed386fdcf1e97e086bfdc58b14ddb9a51c6a91c2d54b58d20715e3829a4ed5c1f4f2fc3cf7d8ed1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}