{
  "manageEntity": {
    "action": "Save",
    "entityId": "817075278",
    "entityType": "Track",
    "nonce": "0x1e994d9c432a6aab9b60ee5d0a623d588ac73b0307eb3134767c5661b9ac70b6",
    "signature": "0x5734cbd34bee5f92f8631ef66b46cdf53600a52ed962680e8a36f9576fd0cd771c1e544e5d8527d8776f0f2e149fae517c1bb97d84fecb603bc425386a245fa51b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}