{
  "manageEntity": {
    "action": "Save",
    "entityId": "923360404",
    "entityType": "Track",
    "nonce": "0x4c7c06d1a2403942cf3ddc0093223bdb079d83e62db972dd9cb4bf0485a9d32d",
    "signature": "0x38c32d46ad8f6edc58c4aaf677d3c66d6e750dca8b6b50b03c8664e9be250c146f863caf596e415182bbfc31203d4339e49c71a68e591d2640aa767f9c81c36c1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}