{
  "manageEntity": {
    "action": "Save",
    "entityId": "540343027",
    "entityType": "Track",
    "nonce": "0x1fa814c47a8cc7a4b4968e7a5b0884088d8bd24cd5924d285dc60041a728ee55",
    "signature": "0xa774d50b868099e67bdfe9ddcf24c9da7827c57e1cb1bec5a06de82600d518de7c7496ba1d406237f705ed1b729a38bd69ceb153ffe9c76b76b691ce02d2ea531b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}