{
  "manageEntity": {
    "action": "Save",
    "entityId": "1815033453",
    "entityType": "Track",
    "nonce": "0x02075989d9513b4f46f490ca9cd05fccf946c170614d6f589f7a907bf3b4048e",
    "signature": "0x8daea47bcfa93373569f006b5fd0d2d4ac85c7007e449e251663d63f873910fa6e2df5312b6ff65d29bc91f629f4750fdcbfd17f5d7ef22c1a37720e20e07fd11c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}