{
  "manageEntity": {
    "action": "Save",
    "entityId": "615107",
    "entityType": "Track",
    "nonce": "0x054d7856c06ec0bc2d6dff5395e76b71dd71048da1c7fa37a4cadfee732c073f",
    "signature": "0x1eb2aff93a3d9ecfd3789a73d33dfbab3b04b636d3668cdad96e2c02a5a31b2b1fba8da084a5bf41620a50ce886fd030034dcef054dce0f6e947e00867e07f841c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}