{
  "manageEntity": {
    "action": "Save",
    "entityId": "1565291691",
    "entityType": "Track",
    "nonce": "0xe3b0eea576ca70675721d367df852a3d7b7a19b5a8f9ad4d00cd9a009024d7d4",
    "signature": "0xa5608d492a87cf7cdc42ac940486dd89bcf773c400488db7352670a58561e96b7eddff59a6dd85a5bcfef8d825d0b308e364e47e93b6c2c7995abb77ffb596fe1b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}