{
  "manageEntity": {
    "action": "Save",
    "entityId": "20343230",
    "entityType": "Track",
    "nonce": "0x4cc99c8d342129ead8308ffd45a134ca1b7767141f0d65facbe748c3accbea52",
    "signature": "0x5f6232ad1637a5cd5bf1eefd548460b5455681e3a08975995dcbb90cc373580261ca51c66619eb500b7d5c703a59f7178a01a563146b1610159925fabd2be2771b",
    "signer": "0x68A54B886aeE0c88Fd14D1eF8089843b64452658",
    "userId": "428106597"
  }
}