{
  "manageEntity": {
    "action": "Save",
    "entityId": "862157546",
    "entityType": "Track",
    "nonce": "0x37187e18b1bc94b8e082402747e581c5b320c56d7f6139464156c9b1ec67a237",
    "signature": "0x60b018f09c4cb1e1b943c7dde76241f51e1d6f5d954371ec9f92c8f933cec7a43f28c7b3334e4b0914cd7032261269d2ed554ca07413c5350798251dd3a3344c1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}