{
  "manageEntity": {
    "action": "Save",
    "entityId": "207004020",
    "entityType": "Track",
    "nonce": "0x9b596e7138bf606a694dc18151edafe2b4f0855e960555b257de1da864e13091",
    "signature": "0xcd514a2ea475091424c443a079205da474da1290a312b04b9e7faacd903157061e89bd180527eeb9a2db1b0b80097982f9a7a45fd095381582f8030ea74a6b421c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}