{
  "manageEntity": {
    "action": "Save",
    "entityId": "1617048350",
    "entityType": "Track",
    "nonce": "0x7627112df4e34b8a49ea99954f9a964a9c130068797b8c007982679db1f93317",
    "signature": "0x024540204dda78d99d365b3451bbbbda0e9cafa4da785b00abca93f5360b3a7f643d17c115bfbc1e72c17669c4d3cee0f2edf4f97ab4f5d3396869a56302e4bd1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}