{
  "manageEntity": {
    "action": "Save",
    "entityId": "271680957",
    "entityType": "Track",
    "nonce": "0x3ef944b247a9f093480b64930c38b7fbda19ec52a0036971dacef49012145bc5",
    "signature": "0xe64b13819c3c058ce76ebc92492334c3677324feeabbf8ac3dce159bbdca82a3391dab220aaeb4ff9aafc4fd58c3075d10edf9fca57f3712d4262387a2b0a0821b",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}