{
  "manageEntity": {
    "action": "Save",
    "entityId": "282184964",
    "entityType": "Track",
    "nonce": "0x5f2209266b388429f56422c3adaadabe6bd1dfb2a3482cd92fbbd288fe526a75",
    "signature": "0x04b847a6e1d7fd25b7fd72bbacdbb71eba0962172d47f616b1df216a79e6f86d469a2c29796dd4ba503e8e6f570c28df8bdab876d488506e94b46aaeaf9061761b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}