{
  "manageEntity": {
    "action": "Save",
    "entityId": "1651503510",
    "entityType": "Track",
    "nonce": "0xeadeda155aa859d5d75c4e58b44ee4659703ff53871fa0a1b26cb6c676802521",
    "signature": "0xcd3ebfd4680d90177592976192935affee8adf66bb79da72aeb3c87875df13c43db5de8e9027dd98f24df41f8d8c73012eb183acda0888cf5022ad20f2cdda461b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}