{
  "manageEntity": {
    "action": "Save",
    "entityId": "2115730628",
    "entityType": "Track",
    "nonce": "0x76229cbc0ac167a50542ce43e1a6541e0a71556f87620ca138764f643990aa4b",
    "signature": "0x81beaef0335c9b75ac8348b975a53ac594ff3db0b818245bbd5eac60e8d601c73532aa4dd6a6b0ccfa2988866586274916541f719c89caba65203658adb15b4f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}