{
  "manageEntity": {
    "action": "Save",
    "entityId": "234893",
    "entityType": "Track",
    "nonce": "0x38d66ae2c0c7c83134cfbc0038b854f2cd2fb0920f9489963188f278aae2520b",
    "signature": "0xe397ca76c7ab091a59eb602918fbcf4b68c4f7fe9dc47488a55e01d2cb93efeb41fff0e93e177a77e24c2d2ea74d56364fe5d1ddd331ec380973bc9f1894bea71c",
    "signer": "0xf63b89A0Bbc03C7ec59aC257C7082A056082cDB8",
    "userId": "558452493"
  }
}