{
  "manageEntity": {
    "action": "Save",
    "entityId": "709698085",
    "entityType": "Track",
    "nonce": "0xec0d0ac3fc28e8708513bcae29f30a084f591be7e6fd9749ea875bd9f26e8e0e",
    "signature": "0x46c58fe5de2ed938adc5d8df31f5fc7ef2981d82ad7d54d257aa5635aa9ba67e355a3f1a32e29f5052d26440081e96eb4f55f7e6c399925b014c79d3e3c1d2761c",
    "signer": "0x5B83E7748cF8e414B76B16e39d629AA8deDB4616",
    "userId": "604013128"
  }
}