{
  "manageEntity": {
    "action": "Save",
    "entityId": "1309770141",
    "entityType": "Track",
    "nonce": "0x64cb3d29e0de32c3ee3902918ddcc392ff5a35819adbe3cfeca0660d7e550a77",
    "signature": "0x1d5281b9bb2587705ecce001d958d2ecd79f56b98e9b04bfe77cab7579ec9071148160b14b04a3021261ca2047f87702e0f680c0fc0d026e5e3156e60fce53bc1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}