{
  "manageEntity": {
    "action": "Save",
    "entityId": "1027918",
    "entityType": "Track",
    "nonce": "0xf6b42269acffef0e29073e2571f2b57c70f15af54e7f0906fcdde83e19b5fcf8",
    "signature": "0x81a430a9f95d931ffc684af6725655e7cb196caebff5d39c22a9f194200b4e286ae2a44a40f59f9d3d995724b84333104475cf2201da47e3b68aa5e3a66289091b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}