{
  "manageEntity": {
    "action": "Save",
    "entityId": "498510595",
    "entityType": "Track",
    "nonce": "0x162de723b2c5e05ae3d933e0ae63bd55dc1346d46fb38c7d006414f00607fca4",
    "signature": "0xade2ec465c4e3e9ce6ab34c1109bd81dae37ccd4b1ebc6c7e8f257a307b34f884e05e4bf4e37da245e51682f96d9497754b407084c41a4201aa51530132a69641b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}