{
  "manageEntity": {
    "action": "Save",
    "entityId": "622065645",
    "entityType": "Track",
    "nonce": "0xbabc09f414119004055bf455866a636f9567960c75de5ef708e13fa9d1a9594a",
    "signature": "0x44586e3765aec9e840093888c792379faf76e3a2b6137dbfceb9e8455eb45a803e6482ff3a8882e6fe92b9a73cc37b70c44d2552a4009df95bcc4ace8884833c1b",
    "signer": "0x0a5148A3f132E6696c1Cd3FDA8465fC5fF17d3D2",
    "userId": "803288761"
  }
}