{
  "manageEntity": {
    "action": "Save",
    "entityId": "1841050965",
    "entityType": "Track",
    "nonce": "0x87fe3f55698e084b48910c7fa763966ec44b55e049e07be7f021eb7e4a898296",
    "signature": "0x9fa5f366fa816788a18403483edc3476f377b47862ee288e853584b3331ded9a3bac9c45647d1e2c1aa2c52c76b04225aec9a863c5456ff7fafbb74bfcd33bf01b",
    "signer": "0xE4cD33CA403714dEEc032635D51d9D3345c225d2",
    "userId": "967323686"
  }
}