{
  "manageEntity": {
    "action": "Save",
    "entityId": "1274274570",
    "entityType": "Track",
    "nonce": "0x2eaf13b51db68985a01856f4b9124892dbaf0f394d4b043c79e9c39c376a3182",
    "signature": "0x646af5885c9bd368d186e26bab2e13ee45a481e79c94076d38dd33552e4256c40bf0253fe9849db6d3061f666e319e6ffcef12667aa43179562dad3302f762f61c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}