{
  "manageEntity": {
    "action": "Save",
    "entityId": "993648",
    "entityType": "Track",
    "nonce": "0x581a8f54b7e78e134b9d615254f7f511a171a524ffe0fe25605a8a0db48789bd",
    "signature": "0x6e6d3297ccbed8f1f81de64d67161f7ddf781c26ea047d20804fc5f2ca379ba851e4d4c6775d8cd9694a4c4a7b317319e53d63576fae1dbbbd3ef1fb91f7f3001c",
    "signer": "0x2B28feb1CA15953a5a910C4E741698a24e8b3FE9",
    "userId": "887020893"
  }
}