{
  "manageEntity": {
    "action": "Save",
    "entityId": "1756269475",
    "entityType": "Track",
    "nonce": "0xf9158856d53c799465ba1c6c92d198b59d445a5d8173b3ca547317a22ee26363",
    "signature": "0x7f5d557815dac3e7d1e1e6ca8191bccf96c1737326ab8fb6553a67db4d55cda14952a7849e81dd88cef0b1c3256a4588470d0594872a6318410b80c52ad35bf91b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}