{
  "manageEntity": {
    "action": "Save",
    "entityId": "679449038",
    "entityType": "Track",
    "nonce": "0xea811091083047a1554282b7e6624a1dc32ecb9c098e25d74d424daf97c39ea1",
    "signature": "0xad71852a714c6288140c72651547ec6246400b5ba809b56d760c2e514e8407017e466e39063c2fd36a815f4a8b75b23652c719f864f20e52b150c5fa9865de451c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}