{
  "manageEntity": {
    "action": "Save",
    "entityId": "459986732",
    "entityType": "Track",
    "nonce": "0x0c417a15455142144ed9fbf889f8e91c3273434cafb7407c487c2346bdbaa663",
    "signature": "0x505af6045fb06aca7ab52f537a90d97f8870cf894f64cc13a143fa79043fe05a0851d40539be56e22561de38420841ea497a2bb2c42f0959ce0f9be73c7ce02f1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}