{
  "manageEntity": {
    "action": "Save",
    "entityId": "366281335",
    "entityType": "Track",
    "nonce": "0xb12a1b60652a20a8b1513a308c4396a1d42c8932f30f76c8b8fdaec9c7ef8f8c",
    "signature": "0xd49146500f9cb6558550ae37989b8db2d82751e0bf8ad2dde6d72cad53f35ca42d3c3fd2cff4191856534f8e19a5c631593082bd835473850fa57b492283d81c1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}