{
  "manageEntity": {
    "action": "Save",
    "entityId": "489180860",
    "entityType": "Track",
    "nonce": "0xa262285b5c811bdac35c9473431a1fc28f879ab47c80eeedcfd81daeba0c9488",
    "signature": "0x70359ba089aff5f528ad199e4fbc4c15718501163b3c73926cbd72f80164dff10b222c0c5b0dc3cd54524a638d3676924c2d153fa1448059324bbeac6fe04e241c",
    "signer": "0x2CD314789C9583D12b6F54862F9E2cf505880Ad9",
    "userId": "354640"
  }
}