{
  "manageEntity": {
    "action": "Save",
    "entityId": "221270972",
    "entityType": "Track",
    "nonce": "0xac21644632eafaeda5810d67e2ee6b88f56347bba26b03edb861d9ff9a6baa4e",
    "signature": "0xce325320248da704c0d6db09919e85fb54b5a4c396ba5534aa1b6679f9e81e8941fc7f959c82e205319b6e3865fc8b5822e08968d18206abdf140858bcda63e51c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}