{
  "manageEntity": {
    "action": "Save",
    "entityId": "656251055",
    "entityType": "Track",
    "nonce": "0x3020e86e3daf8784885430367f46a6618561a61df269ad3b762e07e10df6cafe",
    "signature": "0xee12da6633123164cdf828bfc07539fa443fea3cd3ca517775e97c3695ca4f4904c9ba2961c40471d929bc085c51653136cd3af451f54479238829c25439b7df1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}