{
  "manageEntity": {
    "action": "Save",
    "entityId": "259325786",
    "entityType": "Track",
    "nonce": "0x56e0a21bbfb62052dce9e0ff4b74bf992658f33fccd62580d8a5f32650fbb1e9",
    "signature": "0xe8973b1208106547493814f32463baba09defb69c4537f4135c2c7acea113b8f130a390ac820acdb3310d629edcc4ff42e88abb6a798e38e03f11d386014bae51b",
    "signer": "0xE6a2533061175ED4c7f073A7BE3dc4189A4DE47E",
    "userId": "427249190"
  }
}