{
  "manageEntity": {
    "action": "Save",
    "entityId": "1230295655",
    "entityType": "Track",
    "nonce": "0x3eb2cb61e2f2ec0be1d1d26669bc356e20ec20fcff46aadd73944802cab7440a",
    "signature": "0x5d4c2ea4f1615c96d38aeb7b8560ad84758fd65a596471bad91826dfdfd591a331fa2e3982cb2933a9be03de3f6d01bdfb3a72f4a813bace2ebe4bb121505ed41b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}