{
  "manageEntity": {
    "action": "Save",
    "entityId": "809283961",
    "entityType": "Track",
    "nonce": "0x20a4831bf04f6ead27559525c40d618389f548cc208d171b514d3e94fe10251c",
    "signature": "0x14aa944688f515925db2a19ecfa764dda1977e3e21192882ecc7a90fbd926db150b08fbfba4d4e8ee6ab9b84e54ae5cab64e50531a4e6d2b89547eff5c94f99b1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}