{
  "manageEntity": {
    "action": "Save",
    "entityId": "1004313",
    "entityType": "Track",
    "nonce": "0xf884ff3a2c3e6c93698496443560e7d84dfb33f946870455960b591d52d8598a",
    "signature": "0x5ae5fda325d84c4a6d9149aaf19a5d153f2c12a8f754356cd6210b5ece817a1d0477cd05b8f5a358c9855721b25a35a98f40b724d2aede18c751e6c9fc85153e1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}