{
  "manageEntity": {
    "action": "Save",
    "entityId": "763959",
    "entityType": "Track",
    "nonce": "0x3a85cf9d79e852cb7353c46c9706b96f2befed7f56cd5571f0a13b4e92e1738e",
    "signature": "0xb341d7f22d26914cf7d649147c92d020e9d2c81dbfa384506d162f33859d936c5e57a163bcfdda233615c0a319d2ef459cc536897f6238e12264f981b3c1b0151c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}