{
  "manageEntity": {
    "action": "Save",
    "entityId": "980599997",
    "entityType": "Track",
    "nonce": "0x41cffa4383cfde6390805212685087996ce331ca251a15ef4d488c51d5ace417",
    "signature": "0xb03a3295ac75fb1c5252b57810ce0a5a6017acb0fe71c3866b67873bf48d6be146ffb4cd67f088b0a5acb4bd87463e78a405421e0fad24a16d2358b097a3ad2b1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}