{
  "manageEntity": {
    "action": "Save",
    "entityId": "142274",
    "entityType": "Track",
    "nonce": "0x4b9ba9bc5e6626457e29ec8b9eb70968c13eb610339510551fd3f45a714c325c",
    "signature": "0x3344f59a03cc19ccd2e67763ee80e45ff2a9d4dc656a92d3127fc89a1524dd48776b60eee0fef11981aa882c5a765f4a2081cd020ddb9abacea97e9a95a88d7d1b",
    "signer": "0x8D3Cabb7A85dCf573e6112D7FAf1dfD727a2Fe81",
    "userId": "878616439"
  }
}