{
  "manageEntity": {
    "action": "Save",
    "entityId": "352535",
    "entityType": "Track",
    "nonce": "0x76afc8697e140c1b34db7df8f26471feeb3360ca06096e56088b6140aae20d5d",
    "signature": "0x1c9cf42e6062498e654717d82fc63ac2c54408855d00171f27acf185b021a7830e9fdfd521c67e49aa367c44d8255d34475b1c34be8110c2ec9c5f5573cfef791b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}