{
  "manageEntity": {
    "action": "Save",
    "entityId": "174277",
    "entityType": "Track",
    "nonce": "0xd9648284b489777b07edaa18d5d1807772854c792a35cc7816abe4186042ff44",
    "signature": "0x8a8300966826c00237abb908ca246a7717a846f33f2998add1d84e2548956fd2381dc4d1507f26b130e74a1c8b8fc4908199e8a78645d04202d24f88e5fff1171c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}