{
  "manageEntity": {
    "action": "Save",
    "entityId": "286709176",
    "entityType": "Track",
    "nonce": "0xb8c6f63884dd13223c4a2a87480ce5563b547db368b121c2cb606341b41c38d6",
    "signature": "0x5b657220508891ae4439a078bd2915a5fc004ca99699b26e66bbaa91267ba12c10425ba1ba608db8549c78b6b5873cdfbceb91cd3e45f6d1060a82ae5b2b4a871b",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}