{
  "manageEntity": {
    "action": "Save",
    "entityId": "485941",
    "entityType": "Track",
    "nonce": "0xdda5fe33e330f769177531b2206b86b430b8e9a2576fd8b848e1a9fe37554cbf",
    "signature": "0x50f5f8f129e5dd8723d262cc9e99224c7d15d4743ff43706b2c4807a184edb601c3961fdac635506cc620d11689d3134ded1a8b7137bce0d31bddb45fd9a8b5e1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}