{
  "manageEntity": {
    "action": "Save",
    "entityId": "1104266",
    "entityType": "Track",
    "nonce": "0xeff615fc236aa087ab8c7d38384baab073fc3305b72586c9ccd658dd5a0c011c",
    "signature": "0xd2d5fa4dc712c2998f25862b00b1f9d4d27425efd78c011cc3e8662240dcd58d298c3555c41695f8827fef2275ed53876af0c56fdf0729b28529456cb965f5b41c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}