{
  "manageEntity": {
    "action": "Save",
    "entityId": "1665777530",
    "entityType": "Track",
    "nonce": "0xfe379552302eb9da681acb1ca98dec47af18e8f955b7bc9253812d6ccde86da1",
    "signature": "0x2558f22fd84ac229bf03dd373e5e2c52e609954bc998dc8b2625212ba8e29c01720a92373c7e0fb0a8214a69f176d7325ecee6b610ae0ba8c56f89e6c9e9c86f1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}