{
  "manageEntity": {
    "action": "Save",
    "entityId": "352232862",
    "entityType": "Track",
    "nonce": "0x9aa714aa34802ffba03fb509879a745e97ce20f34095200fa2867d46b4ef40b4",
    "signature": "0x5aecaea8b9af083c828a232199b1b653f9224ed2cbf3976be62569c8fd69eaef6b2620584ab45034f8092292231cc882766e3483a0987e28695a475994beb1b81c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}