{
  "manageEntity": {
    "action": "Save",
    "entityId": "1406819354",
    "entityType": "Track",
    "nonce": "0xcab1fdfe2d52872b8bff502e597c4db27426e53190a9c0150692ee3826d2c272",
    "signature": "0xdf5cf4b2127dbf4523699faccfdb29d40e17b50701e056a3da38b26154577bdc1a6deb34084c8de89104a84ffc70a3a26b59d9995d09ac1d40fe4c28643b6d911b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}