{
  "manageEntity": {
    "action": "Save",
    "entityId": "1726655327",
    "entityType": "Track",
    "nonce": "0x83bd912bf1891536273e37a282af19246bdb959a3de3bd63f96bd5d63b4b55e1",
    "signature": "0xbf699505ceb26b9fe6a38d29d549c55f458aa377604d7756ddcb571843c366c629a26f9bd57b6cdffdce2559f0762656b3bdc7815e31ab41810c02d1baa51a201c",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}