{
  "manageEntity": {
    "action": "Save",
    "entityId": "273698",
    "entityType": "Track",
    "nonce": "0xed9699fd8d7e9d2c8e0c21358dfe35fe55b5a70819f99ec80c1c30f59fda0b09",
    "signature": "0xc83870dbc498f9417ed1df6f5d08b385065f422e3cdc770c31b6b5605beba80d616313d14ff589f7b5430c3729e194d6816e0e519a72cee418e98fb70ddf34d61b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}