{
  "manageEntity": {
    "action": "Save",
    "entityId": "563283580",
    "entityType": "Track",
    "nonce": "0xefe390e6117ba45bc6764e071be055ab088de0a71fdf77a36f299db784cb5935",
    "signature": "0xe561ee95caf391176fc963f637ccf8f8d1f803d9c2bcc23e762751f58b265deb19282d91185a773cc40400ebcc83100c18869a3b48d818d56ac1e0060cfc9cf21b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}