{
  "manageEntity": {
    "action": "Save",
    "entityId": "573001",
    "entityType": "Track",
    "nonce": "0x5680449fb55dd8055e77cdb00399da5e7b6a89caa803345a9e242fded34ec58f",
    "signature": "0x16b6bb2fdce5e098c146c76cfb3319d100c4b8e40f9650dead4f20312e2e379239a1b3276a9e3ffe572bd715bbdf876682df97d301e0267e04f0d21a8f98ae001c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}