{
  "manageEntity": {
    "action": "Save",
    "entityId": "617324683",
    "entityType": "Track",
    "nonce": "0x3ce2702b6550ad7820e9e63779782261150b9486dc60fffaf164957d949ed8d4",
    "signature": "0xed3f965be6066a6f9226fd8577f24e1d481f43d42d70fa4c59dfe507fbfd9a8d78eed15cfbd8bb897ef20d2441bc7ecec5c54f229392f70272ae5de5ad374ce41c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}