{
  "manageEntity": {
    "action": "Save",
    "entityId": "617013",
    "entityType": "Track",
    "nonce": "0x8f2ba003ea3370c1b8f411b773db9725031a9d59cb64b1ce4d048e2c468178f3",
    "signature": "0x064a67b539f6547822e51fd610ad8b127482fb4fccec1dad3e9b7febafe4b8284575c406f91e6711568ed952d48cb8d20d9f58838d5e16bf974a17189c4dd6dc1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}