{
  "manageEntity": {
    "action": "Save",
    "entityId": "332811",
    "entityType": "Track",
    "nonce": "0x858df48cad15014c3254a409f1193efc250e2f7d10f6081f4507d05861a5410d",
    "signature": "0x0c608c28d8b270bae9694cde980a638fa19eca28ccfb3ca7a0f9aea6eaac7f11751805572c01aee42aeb6ce0b870ee551680920408b99c3b479e910b849b49e21b",
    "signer": "0x354f479338B7F1593E5Ed2Bdb91a09c4bD12996C",
    "userId": "381478870"
  }
}