{
  "manageEntity": {
    "action": "Save",
    "entityId": "381786",
    "entityType": "Track",
    "nonce": "0x30fde0b7459861450650cb2edcdb75314593e92d535102a4708232139a8615e6",
    "signature": "0x8f6af465735463f54ddf3d1b92f5618f245a2d46573889463dae11404da69ac33fde1a0f97938a03e770bda7681e1a5acfb95f5b35df11b77e4f038bf2a630ba1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}