{
  "manageEntity": {
    "action": "Save",
    "entityId": "912422857",
    "entityType": "Track",
    "nonce": "0x60df0aa64c07e769736f2bfdb413bf1f20820140f7c5f8e61788b2badb49999d",
    "signature": "0x0aa4c490236e046bae851061659f77d8a910193fdf21ad2a21f45e0384df89aa09408bc98e2fe5779292ae801059213671a5d4572bba75fbac357142f8a105831c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}