{
  "manageEntity": {
    "action": "Save",
    "entityId": "555937434",
    "entityType": "Track",
    "nonce": "0xb338fbf9cfcfbe00e02f02276c4c4d61bd7e87cd0bc468af544224ff6f9e39ae",
    "signature": "0x45516601462e4e0e89f515723fcde5337cb72498cfef12359626c1c8ba515c1060a8f8e559c7cad629ee7f8bb710c72c0d46f9fca2d66bb593b7b39c24428df61b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}