{
  "manageEntity": {
    "action": "Save",
    "entityId": "151633428",
    "entityType": "Track",
    "nonce": "0x40cc4e4d997c4464d0f553b170d59b2c10b94a66d07b607ba3ab409b9e527d06",
    "signature": "0x3cfe65649fe2695d435cc042eaf6c4bdd936736ad26d33dcd7e47a5c4f5560286aeffa88f992b8c84be320e10b925a3a4161bd805c89fafc8fbee34599fec20d1b",
    "signer": "0x6802Fe39C5FA9f99ac1Aa32F164982185A3E70ea",
    "userId": "152482938"
  }
}