{
  "manageEntity": {
    "action": "Save",
    "entityId": "920944856",
    "entityType": "Track",
    "nonce": "0x3825c17a8b1f1cf6ecfba5e808ad384f2fded3b372f45196a3065ccea7dce8a1",
    "signature": "0xdce75c6bdd073d854ecef2befa7b89aba525374601c6bbcbfd801d413a19028d6fae1f91873a5cf2f878d0d7af656fe638bc1fa268adb96e87cb88c4216867441c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}