{
  "manageEntity": {
    "action": "Save",
    "entityId": "168550440",
    "entityType": "Track",
    "nonce": "0x6a1b615483a3642c4c51999e4aeee4101fe214747dd05097a281dbd40de61160",
    "signature": "0x1391d3983fe5fc9c9af8b829bed1ac415a2a9ada5005a31d6d6048abbd8ae0eb470b5c6940eabacd517842f31f06f076767a1f0d3c449a72c83bb0a99302c62b1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}