{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592886471",
    "entityType": "Track",
    "nonce": "1792299609096140016",
    "signature": "0x8a78d347e386f484cfd2002fbcb3f39001086a21e9325367209b900988cbc1b96bbe581965ffa480025ffa2225eb7828557850584ab66c3eb3ee94b93d05e3321c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}