{
  "manageEntity": {
    "action": "Save",
    "entityId": "195966750",
    "entityType": "Track",
    "nonce": "0xa78749a3ea2abb0633cdd6932f9b8695dff5bdc211ff7e43f18f48c0844b0a07",
    "signature": "0x27db9eea5202ec5eb7396adebb48ea87178e62cf8082688edd55e5b7bf46556d67b5dba5b158804f714368179f394a6183ffd14b01ee5e268b2af50ad49d242f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}