{
  "manageEntity": {
    "action": "Save",
    "entityId": "819600942",
    "entityType": "Track",
    "nonce": "0x32ee96546e10267b3e46dd422d019c60ee7d01a90b41b6fe4ed2add0f5d7c0e1",
    "signature": "0xb493752ad6d9ce85adf7f99d89a160f7b31bd20c1aa73d89b8722cfe668374765a4e1d1dda3a41181389472bd3ec99a864a5116238facffdeb4df659eb5972ff1b",
    "signer": "0xD4B6aa97d32CbA3f12da9EfE973129E1E154eD92",
    "userId": "824550817"
  }
}