{
  "manageEntity": {
    "action": "Save",
    "entityId": "2025804214",
    "entityType": "Track",
    "nonce": "0x2b6cbb4a1a9b492ecb90b85244cbc6ae96df69d2abb5736d8cd4fe01733b8ca9",
    "signature": "0x25b0813a7317651cba2b8a57103607729e2657ba029b1bd60845cf85278b70bb05c938af5e476a6d722c9dd4e4bf1605da9a5360c45dbb13e97dd42e9d0027651c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}