{
  "manageEntity": {
    "action": "Save",
    "entityId": "233420859",
    "entityType": "Track",
    "nonce": "0xcd67af3a50f0080a2dc592d2d2233d1b504037d1f14d09883b4a600e9602fc4a",
    "signature": "0x1f19e37e37047290060f1ce870b895429b7e1fac2e60ecd8c24cb4f3cc91a5fb76dd2ce4dcd66b9e262e445d6b382d3a64e40ea20aca70433c7d216f707a26261b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}