{
  "manageEntity": {
    "action": "Save",
    "entityId": "1264621351",
    "entityType": "Track",
    "nonce": "0xbd603f8c6e1402b3d6b65e74fd300de2322a2c079d2899ea372ae5f698f79c28",
    "signature": "0x0a39bb88ab96519c0d97ece5ecbab5cb9dfc17001582022812f2fe1f6e53177d3995e3fa787517095402f0a0105a66ce0d427e9e12c2623b5b3ab5e5d133fa801c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}