{
  "manageEntity": {
    "action": "Save",
    "entityId": "480210",
    "entityType": "Track",
    "nonce": "0xb4f021dbf68726b254832360b5e4d3b6bb98bb581686cde003bc9039eafebc9a",
    "signature": "0x35bf19beea17a0b60b8d2a7ed8e67e750e4c11c21773a915437eb37f21ae189a0c506f891651674734d11d44963d3f5786b84dd4543f07d18bf0135b6d153ea61b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}