{
  "manageEntity": {
    "action": "Save",
    "entityId": "298212706",
    "entityType": "Track",
    "nonce": "0x6d32a423b2c1383120038865e859ba66fd73aba41bfdc4c465fc1a308fe8f94e",
    "signature": "0x19d0860706d1bb038daf89b7db45bc56376329ee587b7aca0b2751520bd244250bcb90306d6d3d62def5f50ca9f8eb8b3827a2eee95e1e217f2b224fd12b717c1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}