{
  "manageEntity": {
    "action": "Save",
    "entityId": "240281",
    "entityType": "Track",
    "nonce": "0xa12c47e1cbc3483b23ac2843350654cb18db6483700c7786c12a81e9df664b44",
    "signature": "0xb921cd5b43c2c1b76dd3b70625ca880a4977581318b6f49c5d0beb09fa69ac2f029a4bb4d3eedb065c56a0bf750148fd357bf8a6c835922e1025909d4c437b8e1c",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}