{
  "manageEntity": {
    "action": "Save",
    "entityId": "343659820",
    "entityType": "Track",
    "nonce": "0x8ae68e1b329806fbcad21f143f9ac99c5fdd63052872284e9f487d818f8c5303",
    "signature": "0x83a1702e1f5d77ffc4fc63c5758401c8168a2b5e4b99b749417128096d21b7cf2aa8644832f12e61c5ab5d1e9974864a125d177e0ca45f118f93c8f9cf017b321b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}