{
  "manageEntity": {
    "action": "Save",
    "entityId": "1188673434",
    "entityType": "Track",
    "nonce": "0xa15e75de94fd8a54632daf9d558a39fcbce5520b8b05f8a3a073fa3ec31ce341",
    "signature": "0xf4132baed961577f2f64ad3c408ceb648d7b75e9c9182a8077bf287793a359bc27f0d9b7b36aa1c3b22aa68205d1693e32fb1d972acb23a66de52a829f4c9c2c1b",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}