{
  "manageEntity": {
    "action": "Save",
    "entityId": "1868397192",
    "entityType": "Track",
    "nonce": "0x91a8a6858d813abdbdd68d682dbebff719cd7cce8d5bbf4d114d8ca98e4e89b3",
    "signature": "0xcc506dfb14c0da42a9297f0f457a17fac33c87697ab6fd8108437681f65972c71570845283cd31c6d59a425dff61522fe3d7889d58a70dfaeb04059a219c7f211c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}