{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462633517",
    "entityType": "Track",
    "nonce": "0x6a24fc4aa80e11ec09a31a380f1b75a3a926ef85e22ab5cd9bbe00baed0a2945",
    "signature": "0xc3575e3d0af3aa139da45bca780bdd6d499ca3165a5dec1acfcc1bdbf313bb997f0026980e3f0da78a77f0b8016e4da825021f31e36c66c910c6b3fb3c9d0fbc1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}