{
  "manageEntity": {
    "action": "Save",
    "entityId": "1465217645",
    "entityType": "Track",
    "nonce": "0xe40643b1cdcf25a4734dcea93348ba837f46ea20b41cd2b0a3184696936d0e8a",
    "signature": "0x81a256b3c28bddcd714f1a6754b1182c66ccad53839eef86027cc3d3ca9bbc8c45e2bdf574d32d4003f182d21a10a3eb6f717d0fcdaa14e1f24a21b8335b898d1b",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}