{
  "manageEntity": {
    "action": "Save",
    "entityId": "1688453171",
    "entityType": "Track",
    "nonce": "0xab377fc2a7890126a4f490e31fd2d3bcc933d37edca8eafe620852080d362b21",
    "signature": "0x93089a628f71f32ea3b81b24b661a07a782c0ef2f10a08c7914d369d5074e543610a54175b530ecb6b69265bb68d044a5308599f557a8e1248927ed5a01af8551c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}