{
  "manageEntity": {
    "action": "Save",
    "entityId": "147876738",
    "entityType": "Track",
    "nonce": "0x5182fc3c53f2da38338583e87145449e5aa20fc0457d2acc66ff0aed9be73b8d",
    "signature": "0xe7998a498a599ce6f914f7a881a3152a52c0a27ad1003489d57b0aee6fcd312d5ad5947961fb8d135c549ecf6b5ba30c3b682da89fb665556b970881cfedbd2d1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}