{
  "manageEntity": {
    "action": "Save",
    "entityId": "954479",
    "entityType": "Track",
    "nonce": "0x9e044ec57fca56f59bacb8c8b360e9b70782b5dea5f202cf5830943e086405dc",
    "signature": "0x0bc8e7b681a9a8f3a141a34ee14ea715fdd517350e39b4b5f677efc945b5ed4a544a312f321672cbe315b74ffa366d3109d2a346281d390712db7dcc28cf2ec01b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}