{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780338948",
    "entityType": "Track",
    "nonce": "0xd22b9475327407b5249fa81062d653ca2ba00c07edd571ed1bb1da86843380bc",
    "signature": "0x23ca420ffdb96fe86e4e726560dec46c3278595e1ffed94a5e095fd16765eebd1f90205c9199143ddbcf13c5dd4da0ff5b037bcdb7a88f7884b2b2eb859811cf1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}