{
  "manageEntity": {
    "action": "Save",
    "entityId": "1126652",
    "entityType": "Track",
    "nonce": "0xcee84fd6e2df40c300fca9ba6528b4997e7abda572c829dfbba42d4da1ad7cdf",
    "signature": "0xba3a5e7c992a7e5818889dfcdd62fc77d503f9136c4cf21219874e483dfa30c542e332b5190331f64259539f610720e96e5bac6fd3689891fe95143df78d01401c",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}