{
  "manageEntity": {
    "action": "Save",
    "entityId": "427509645",
    "entityType": "Track",
    "nonce": "0x8ae34b2ddb908ffc929afc9d62b68b65eed418c92af3d06f13b8da53f61abdbf",
    "signature": "0x2c36f1cb365fa90acdbaff3e87eed1233e5d45409c3d82ef88734444efe905d4557ee1feb50d2d9cd3dc3d87afc1740a32657791be417f9ca516d9e018056b581c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}