{
  "manageEntity": {
    "action": "Save",
    "entityId": "1676759878",
    "entityType": "Track",
    "nonce": "0x1d2a82b25ed7c6a974a14129bc0a0a640f57f1ffe330b7ea7c3a9eaa7b124f93",
    "signature": "0xfa3008bf887d3808d3e1dc19af6b33ea52b3bfb486e9bd69b9e1213b1576982f313595a55f3de1609e6d8e3492f77719c71cc28fae4e039bcea8746ac5c9c0d81b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}