{
  "manageEntity": {
    "action": "Save",
    "entityId": "1477108444",
    "entityType": "Track",
    "nonce": "0x5a7d3f8451eb12c7916c42cab716ed3e59e180164198f6851abd2a4605f5c9cb",
    "signature": "0x0036d474026aad2a9f4804f90dbea9b53f3e3d379b559f14f666e595131581d026a6f357797e6c103b722312d7ef5e7b06adbd58cdd28ab1bec0ed79cc29aaf81c",
    "signer": "0xD71D6a61b797d5436c8d291306fd7DbCe6257Cc2",
    "userId": "117522"
  }
}