{
  "manageEntity": {
    "action": "Save",
    "entityId": "1412281134",
    "entityType": "Track",
    "nonce": "0xc19abe3508319f3a218cf767f11040ace814406b8ed30164cb331194e774361f",
    "signature": "0x13d31959a10aae93ade55cf27b678535d227e11db49285bd9605cf1c8352462517eb90255be054aaa204209cbc2e0ce48fddb384bec44916ca30205922590fe41c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}