{
  "manageEntity": {
    "action": "Save",
    "entityId": "635109",
    "entityType": "Track",
    "nonce": "0xc51278c85dbd1510a5013b34a28f65bfdeb8ae053303d66b34a25625cfb52af0",
    "signature": "0xa04b48fe0e1edcf145c27952da85a5d7a3e270c205cc542184a507f2438eb6c13faf9949887c0938afd248c976bc37a15972f74aea77d2ccda82188af22d5da51c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}