{
  "manageEntity": {
    "action": "Save",
    "entityId": "820979452",
    "entityType": "Track",
    "nonce": "0x4851bc3fb01619af65ee17488d43a750ef77c9efb1503e52b756011a8e9d371b",
    "signature": "0x963dbce5311cfce681a7796f69327dbf2f648284caf2658a64be9ce58af956cd20f109643e26afd8023366e0a3225b57b03bebfd4fc7eff07c50c8759f80bb9b1c",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}