{
  "manageEntity": {
    "action": "Save",
    "entityId": "1129659499",
    "entityType": "Track",
    "nonce": "0x31cfbc4a5ca677154ef5b1230c83820000306f022e0654a052c6d3f5c123e56d",
    "signature": "0x25c2e8695155027140e854c213af6580caeb1d181ea39e1c81a9be7a54638b4d0a98f192511062f8b6486c3d50a13b585c4e6950e311ed55f74b2240f32b814b1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}