{
  "manageEntity": {
    "action": "Save",
    "entityId": "592641584",
    "entityType": "Track",
    "nonce": "0xd1608e2590f07922fa982abaaf7b852790065fccf11ba33abf02988acb3df1a9",
    "signature": "0xac91963b5e05b01ab738c108b090ae513045b6e24f1006917f859269090d43ac3df1b44efa650c14408464cd0048553a3345f9df89b2e2c171a5c7fe2c5559da1c",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}