{
  "manageEntity": {
    "action": "Save",
    "entityId": "567992",
    "entityType": "Track",
    "nonce": "0xaf4826463e37965a0434eba48b423c137d7db4a3bdb89f4437af503a75485d90",
    "signature": "0x2f9da529231224de06fb5fd385b31ebe81823f57f0383377b537fbed4aef8c281586f60280b371da1824473fc5067ed132bb40490e413be177870d0b2324cd371b",
    "signer": "0xBC1e39308801a76e71770396bE43d6AC4aa2c813",
    "userId": "160990665"
  }
}