{
  "manageEntity": {
    "action": "Save",
    "entityId": "193372565",
    "entityType": "Track",
    "nonce": "0x2e961343fb86f1e1f5dc2df50e1cac167f78a3d181e4be4d995350ee9cb3a8b3",
    "signature": "0x88d10afe4f91d00cad4f46593488190579e257f159d3d412f55876276076e4d90ab007519cc66d2e983a5560564d2311cda6f11df7f3dc929987351a9fba23d91b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}