{
  "manageEntity": {
    "action": "Save",
    "entityId": "940198280",
    "entityType": "Track",
    "nonce": "0xdc477d913bbca7e527ade2ece1b9b67464a15dfe83311ea0ffe71166048abc87",
    "signature": "0x20de9872e9539babbc713c61fd2cdc1fc3f8406f06336d09018b554eae00865e0c578c5ef1129187509408d96bb3be04a1146b2723092a6b30d59286c5a17d871b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}