{
  "manageEntity": {
    "action": "Save",
    "entityId": "1897144672",
    "entityType": "Track",
    "nonce": "0xf8e133ae0b4d0cea9c71045bfeb6d86c0e4e30d11124ed1b4a2cccb9a985c918",
    "signature": "0x14605f73cbe361b81281cd67b4d6e87c3e886b863a249ff4a73bae143810df0b154b3dcdfc1d19fe0de1c8101e29e9b68c1efe0944fa90140a876cd38f8126451b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}