{
  "manageEntity": {
    "action": "Save",
    "entityId": "734706254",
    "entityType": "Track",
    "nonce": "0x8a93381ca4abaff05e706d192a79b9b7953f6cf0331f4302acf1b44ed8128e96",
    "signature": "0xa32c75b5984a46e65ce5f210c260d80c6fe9cba888e1b4c7c99fe393926ac48157175884ba2df9bfffaaa2bfc1ae4ff3cd2abfe252cbfcec871147ff2a9341301c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}