{
  "manageEntity": {
    "action": "Save",
    "entityId": "583867943",
    "entityType": "Track",
    "nonce": "0x5feeeef581dc7ead6cb54e3a3a59e4863d114421e00301307532a5c7a64f97a3",
    "signature": "0xfd8bc842e346d2b0d2e845466cb2ff134677d47e48c646c361de7d5c716fbe8233a77caf827c2dbe29ba369982a4f6790de8bad83cd35504ba971d50eb14993a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}