{
  "manageEntity": {
    "action": "Save",
    "entityId": "482961970",
    "entityType": "Track",
    "nonce": "0x4e15b9417158ddd0de334581a2496418fb2cbf7b8d06dba839cb5b61b414e66e",
    "signature": "0xd44c40ff28de984a8846aaa8e67f1239618c196cae6aeb2a08fe363a79394f3a35a84b7ce5a19699bdbe1d6aeb86c61317562fed3b35d25f7c5460296f7efe051b",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}