{
  "manageEntity": {
    "action": "Save",
    "entityId": "55506",
    "entityType": "Track",
    "nonce": "0x0dc14e964c348d9bdc05c94f36b5102439aeb0825bdf8389de34dd42ded91f83",
    "signature": "0x72421eddd2a2baec756553df596b36959094c85989027404b158452695b701416edf1ff1e88aadbd305248721e113b00c1cbf2bc1b6fa028753874c76a31111b1b",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}