{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125112187",
    "entityType": "Track",
    "nonce": "0x1f63c9c1c5e13484827bf99aa939d548b23737b44adf9bf870205b914c9a55ae",
    "signature": "0x381399e42144606a05d654d22d0bc9f93d10ea5b56f151191ff40b339a3e355d751e43dde5b14d32deb070d16171cb2aa11457be5a2b9699925629eb53ed3c251c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}