{
  "manageEntity": {
    "action": "Save",
    "entityId": "884757738",
    "entityType": "Track",
    "nonce": "0xeba695f1e155eafdcaed39bc6a019be7982e8a9151113fa8c56f04d252d30384",
    "signature": "0x67e53b1307b309a9dc211f2ef6563759bc61a6f0dbc56da62b576942777eb0ee2a425fbcab40e0feb2f23a38d5c004fc44af8063e1cf461559737812f40bfce01b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}