{
  "manageEntity": {
    "action": "Save",
    "entityId": "187297117",
    "entityType": "Track",
    "nonce": "0xd2fb960a616456154f1eaefc590e00f57192ae2a68e0d875af4d9da96c5c2f8c",
    "signature": "0xe0c75a1bd2c7ce119f72c55a78fb065940fdfdab766d22022b29515a9f8877185e2523d6a53ab7cc0c321527d19340bf0a0ba7775894ed227080774373e5ad051c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}