{
  "manageEntity": {
    "action": "Save",
    "entityId": "1693553326",
    "entityType": "Track",
    "nonce": "0x161e3819252a2bb1b225807786d750a48afc4df6629c562e79cf35f433f020b8",
    "signature": "0x863755eb81f0b60a85e5128ff919b688f81ff7759a6650bddba84cbdf585c304428dc7c422cb9012c4ca138f12c4242a76a1aa315cdcfea720536e1a9524314f1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}