{
  "manageEntity": {
    "action": "Save",
    "entityId": "544329997",
    "entityType": "Track",
    "nonce": "0x64fe98059a806e34db1872bb2f3b42c21ba89e1f71f1ba6568b856784c72b77f",
    "signature": "0xcca4c662310c57209dc83d7fcdaf78eb64dfff0bdfba231d8e66bddba75f9fe74309b9ff32adb12a45359247747ee62796390fd5ff0c850ef62aa7e0644844a61b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}