{
  "manageEntity": {
    "action": "Save",
    "entityId": "1194979467",
    "entityType": "Track",
    "nonce": "0xc25040cab23d42d08b30b56fb15d429caaa50a69974c005fae38b41f437335cb",
    "signature": "0x8030c072c387b86d0d455245ac9116190c2b4476c841706954094a15a723db3034f2cecf6130935d83cde813e03cfc0e7723ba3706b04a7a2dc5f205719fae151b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}