{
  "manageEntity": {
    "action": "Save",
    "entityId": "2011333491",
    "entityType": "Track",
    "nonce": "0x35f5c469980ec5cbb71383a89389039f91938f97bd0d63725b2f49465999b356",
    "signature": "0xb6c36c91e69f83a10385e0f41f2fdd2df27ec3c70cfd92d8441b8d9d9cd1686a7ee2068dd2ad1684b7e7d87d93b28d4dd70896a420aa96150058babfd7f08a5e1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}