{
  "manageEntity": {
    "action": "Save",
    "entityId": "1485828735",
    "entityType": "Track",
    "nonce": "0x9ada793b52a991b5914d6a8fb6c68728d2625b5b68da77620a004c00de3ab986",
    "signature": "0xc7eb8acf981c775857e81e3722c4745eb37e2940b34e87657a70758f4485e919358656bbd487812c54715f769a463693e0e6526b670acca290244a651c685cec1c",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}