{
  "manageEntity": {
    "action": "Save",
    "entityId": "391125",
    "entityType": "Track",
    "nonce": "0x2df19cbd662b6a18bfc31bef56a09c66de949b791941a540572244a5eadd6d1d",
    "signature": "0xe9251f43b824e2eabd034e90e33c355f4767445c5ed6cf79127b77f2b5036df655cbf80362b26ba0cbf19e7de927dc6374007ebd67afbc0f235d9a45e4ac170c1b",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}