{
  "manageEntity": {
    "action": "Save",
    "entityId": "1609444936",
    "entityType": "Track",
    "nonce": "0x7276da1c84820ed9d1fcea181a5559fa9baf5514c188d6dcdebd8f1ef0b7fa6e",
    "signature": "0x095568368f24d1e40520491d8b0c7126ce81bd60c3cf36783650a2368a49ec332bfbdbc784a661ab86fde29bdf7157eeeca2585273ebb646c47519f4fa7a70d61c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}