{
  "manageEntity": {
    "action": "Save",
    "entityId": "1350861539",
    "entityType": "Track",
    "nonce": "0x1b14154f2bef0922af08f40cbb8043c71c1b99097bcff0de4d83bf8b480bb05a",
    "signature": "0x1d60cf5b181b736c35a182da15fe608bff8c45c202540bebcab5c6aba615971879bfdc086ef8167abc4ad94d5a070d6475639655888cc385dfb14da11d44c0281b",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}