{
  "manageEntity": {
    "action": "Save",
    "entityId": "1081786109",
    "entityType": "Track",
    "nonce": "0x77dcc2b1acbc27b03308d3f5d3431b122f3440b9016cb9abb009491e849c30bc",
    "signature": "0x1fd56857bf907bf0d6df1e584a5ea495b6c8b154d2c336f5ad1bbfd6061138cc4d4c19da3dc0d6a9c6931c6f6f6cfeaccff37be8b32fc0de4191dfa019b43c6d1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}