{
  "manageEntity": {
    "action": "Save",
    "entityId": "406073",
    "entityType": "Track",
    "nonce": "0x8f158cd693c38822c020c7a4af044ae4c2c4b14c410401c0d280d8780d29865d",
    "signature": "0x8b9800d157b8858fc0a98ba03ff4d07c053838bb93bc10538e9e635298b30c2d55c7916a6de09810979fade50a26f1e234d7757abaa4729a8233fae54dea4ec81b",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}