{
  "manageEntity": {
    "action": "Save",
    "entityId": "415129333",
    "entityType": "Track",
    "nonce": "0x617391d94ee82c65adcbed427c9f6a72de9f9709e2b9983c6db5d70de7f5812e",
    "signature": "0x38967c0ce7950a28b18185ced156b95adf99f4dc96b852ed056513c765072819629d243e40b1890331255d0e0e7211705d906d314c6cba9f66dd7da635850b431b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}