{
  "manageEntity": {
    "action": "Save",
    "entityId": "278428",
    "entityType": "Track",
    "nonce": "0xac40c011c862fb29a075ae7e26de2c55c05130c6fb6bf90c0e71f29d53f81375",
    "signature": "0xfe3bd9a315f548d7d61aee139b72978429aa5b3fcbfac5744e89a38a46b686e229e6cf3dfb4a8d685f5f03b79e505aef73dfba84af0bfc6eab1b9f2c22eabb661c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}