{
  "manageEntity": {
    "action": "Save",
    "entityId": "599604",
    "entityType": "Track",
    "nonce": "0x1fb4606db2e84d97c0306d377518e6ffc03a10d48ee372aecf70da573a085fef",
    "signature": "0xfcf6818907890ccbdf62b27667dd10a895490c66be870b4d58e9932f441ea3d5778df751c5d087d1002312ebcd549f2a8a43a20a313fc648b703d5b0269d4dcb1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}