{
  "manageEntity": {
    "action": "Save",
    "entityId": "195434616",
    "entityType": "Track",
    "nonce": "0x032e941b3b29feacbc7e38fa250888845b59f3b60a3a72de3492551f8c30762f",
    "signature": "0xa1a7adeb1160cf4f13b5c37dec986cad7c311ec83b6309bc58860d3b5dc8650c1e85b0b8d92401d6d94ece76ebb6044fc07bf77ff743fa95c9210f0394090c451b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}