{
  "manageEntity": {
    "action": "Save",
    "entityId": "1463691836",
    "entityType": "Track",
    "nonce": "0xe0dcbe7047306909a485c725051d26e3a3cc5771191c38884866b81354994256",
    "signature": "0x5f6b4e9d4f5e568d8ba35c39e11c2ead4761e31ecaf0f71fed4d325fc75a7920045a917eb61f552eac3ebf230370d26b1e73f7d9b1fcf7569533a4b02943d9a81c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}