{
  "manageEntity": {
    "action": "Save",
    "entityId": "469880",
    "entityType": "Track",
    "nonce": "0xad32561f7e1705fba1fc22434a99a883af0afebfa392d988b808ec91e9916cb1",
    "signature": "0x491e1534e028db723f9ea55f27cb92cd48564d35ffbca7aa47ab29a2ac7e08fe7876708bcf513cac84f7515ddc8797b6ec645a384963e1e1803d482954246d841c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}