{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777710568",
    "entityType": "Track",
    "nonce": "0x716dd57d07814832662081ccd8db5d3103573638dcaf89f7eb8e04eb1459e506",
    "signature": "0xbc1df5f9929aca0f438e9874d1817bbcaddfcdd84ec89102f7a99f2d7575dd761d16a4a410b7b8748e973d3c07f774a5577be97aadab018a5989f5df8560d3c71c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}