{
  "manageEntity": {
    "action": "Save",
    "entityId": "798043737",
    "entityType": "Track",
    "nonce": "0xa9df8d1cf631194d1af9bb69d8c2e7bd9b0d7d0f09170ff591518cba49be491a",
    "signature": "0x383850b9b4700407ed3a4d4bd29046168996621331ae26de7145b6364ce2a6706dc037e46f504c4634affeba7e7591a71da9aae806d1a81a88ce6c280264f24c1b",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}