{
  "manageEntity": {
    "action": "Save",
    "entityId": "401828",
    "entityType": "Track",
    "nonce": "0xbdff5c8a7fb6c1a6dcd91cfe9a8fc725ae46627688705e5713344df9f0942626",
    "signature": "0x3cfaacb106e6da17e1c5250cffdecaac51fd3b6d37e4cb5fafebf2b161d8efae1f36d1cf62d2247ff00278d33f54bf1e25ec4a5f7ed4bc342a2acc61951c3c001b",
    "signer": "0xE4798770a951408B407807D3d07D6e572dA538FF",
    "userId": "181315335"
  }
}