{
  "manageEntity": {
    "action": "Save",
    "entityId": "1397810055",
    "entityType": "Track",
    "nonce": "0xf72462d1a60cbb976fde074c185b80f813fa5dbbeff8047c3426b3015263fcfb",
    "signature": "0x8651718617f9d876d30c659116f47563432f75c064be215b590a9aaf4a7ac0cd022883082118c40a74ca95456743b6727b38fefd30a8603653bf98f51afc09251b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}