{
  "manageEntity": {
    "action": "Save",
    "entityId": "1939389831",
    "entityType": "Track",
    "nonce": "0x923b6ff0bb43cefaf36ecbaca151508afacc465323da418023e7789a9bf06271",
    "signature": "0x78688bb58540cd31b77e50419d07c037d0fe7ca6f258f3a4910941e3cec6dc10716be0bb6c4a4abd91fba1c95ddc54f8b115beec6d180a6f9cfc2d017fae8b841c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}