{
  "manageEntity": {
    "action": "Save",
    "entityId": "1272432739",
    "entityType": "Track",
    "nonce": "0xc59e3437e1bf39c2ec58482e44e143ba4aae4ed5f79a82cb3b8c87a241485ef0",
    "signature": "0x7f0a15edff4fce56d2431ab5d494e064d96cd81d53830e11d826b9fca06f91ad2872b24389fd39337aa20d420c949eacc25848b47113852f472934745ed81c421c",
    "signer": "0xF7F56DF4D8a2Ae2BF9Ca645DC684f84c37BbDaFe",
    "userId": "116272245"
  }
}