{
  "manageEntity": {
    "action": "Save",
    "entityId": "548157560",
    "entityType": "Track",
    "nonce": "0xcebe831f8656cc9895e0e4fb407fc42ceceb4ef50f0016b992f80ac5d795ac99",
    "signature": "0x6ae941cde6d379d7d063cdc5c20ba78e81df80a080bcbf19c34bb1a8893b316f41b426a983a781982725ab8a7e2551a5067fd4e0b77eadb6af0f1f55cd11b3781c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}