{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255164808",
    "entityType": "Track",
    "nonce": "0x1ec0f63d5aea84ddcf5af503304df31eb03578e39838858fe739c1d32e274fce",
    "signature": "0xa229207107e7ed06cf338956ec9881948261c659935e68ce733f62f07daa394321dfe42527f460a08fe02a58bf12ca294f96f4bea09f1352ce60733f7e975dba1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}