{
  "manageEntity": {
    "action": "Save",
    "entityId": "1657112353",
    "entityType": "Track",
    "nonce": "0xfde929a35254f418e24b68867573a5ed910f60bb62d3fd8b6f568a5e7746d5ce",
    "signature": "0x1b5227a485c4e019b14ecaebdf63d14d72e797f97c26c1f40f1be1f8db0643817ed985d7303b8b6df714e0513c74d16bf4a9d961f7e3fa454b22d0a16254209a1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}