{
  "manageEntity": {
    "action": "Save",
    "entityId": "779376969",
    "entityType": "Track",
    "nonce": "0xef179217408001b4c8754ddd952e79c83a1d5eaa3a3e57471a8eaf97676c5174",
    "signature": "0xd5561554b96c2e852bdc1eaa49942aae5c86e43a429176cc408254471864e5914abf817e9662207f3b6185ae8b17f8174b698dbc4c783dfc06b4bfce996cc27e1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}