{
  "manageEntity": {
    "action": "Save",
    "entityId": "428226867",
    "entityType": "Track",
    "nonce": "0xb9ca87acf97fb13513c840be4d5f4f526fee7a6755c64860b0ed49f9a28d00e0",
    "signature": "0xfd20dfef5d55c79c6e2418dc0df48b4060b593f971528d748f562217afe8f30f2938cbde6fe70356844da92546ab325d47a29118f11e0d5ac0a9c81db53026421c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}