{
  "manageEntity": {
    "action": "Save",
    "entityId": "576683868",
    "entityType": "Track",
    "nonce": "0x1e678b164ff9add62c37c8bd71c847d82bc26b9c960527454d8989d9f009e0cf",
    "signature": "0x75bb74a7e77715371e82b1318d6c9898b24aa0b692d0af8ef6376b1d6f48362e7a700ca6317618a1d24ce50470a95b3328d016aaec610c93f91f838a3bdb53a71c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}