{
  "manageEntity": {
    "action": "Save",
    "entityId": "1421592252",
    "entityType": "Track",
    "nonce": "0x3ad72a17010836d7a5c79d671f4bbfd11f9bae72eafc8332bee4a1c19d9b462a",
    "signature": "0xdfcc3e9a04fdc2f780cdd6a39e9491709b822ab3e5f7dbbd7dc4c94a5f4d067d1da22f1412eb53bb08d9128e71e060ac0a5895eac963b82be6f8ea72066c6fea1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}