{
  "manageEntity": {
    "action": "Save",
    "entityId": "224956",
    "entityType": "Track",
    "nonce": "0x059dfbb75644083cc2e8dfba7c2ee280faa87ac07c917aea265733eff4fb1a7b",
    "signature": "0x94dae4da786e87a536d70cb4ce2ab1fbc386204fda7594f4ea907b2f3c3b354738e45bd39d81afe6ddf751d923bb813e00295f9c52fa3b294a69d892284094cf1b",
    "signer": "0xBc5708e5eeBa74ea37A586d57F62BCEe7D3b4854",
    "userId": "109993"
  }
}