{
  "manageEntity": {
    "action": "Save",
    "entityId": "74755481",
    "entityType": "Track",
    "nonce": "0x517e31b4557ec0b32c842a60ffa120679969b75e9c18950769d1fb4c51eb6193",
    "signature": "0xfe211bec68bc5a4ef59e525d16fc38659f664160e6189bc3ab927fbe566f1b2c7776bfd27ea8231fd4a11de623c709394b6852fee4fefaffae82f2029a4cf3311c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}