{
  "manageEntity": {
    "action": "Save",
    "entityId": "1048510884",
    "entityType": "Track",
    "nonce": "0x0286ee51beb5891a41a246a3c469ff642913cb00af3032715f5e2001a02b8640",
    "signature": "0x384cf86356e5c00fcb32df991969d5560c2bf759454ff39bdbc4a7416484d5be1aa0dce2b6e56a187a5be2fc1515e482867f62b323010c779097ff41589497541b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}