{
  "manageEntity": {
    "action": "Save",
    "entityId": "411587599",
    "entityType": "Track",
    "nonce": "0xe8c5dd6b46444d2e57eafd33aa1bcb16518d132d47b805c870d9b99b64d5fe09",
    "signature": "0x3a6935815af105dcd69665e26f7e2fdaa2b05fdfe8af45a97a4140e7822ccabd2f4a3d95b481ad854fb4622c700026f67704720674c22bbe638cc840734e4db31c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}