{
  "manageEntity": {
    "action": "Save",
    "entityId": "1369430946",
    "entityType": "Track",
    "nonce": "0xcfb30e9d1e6c19cc9af72e7bf0d657afa977f7331dc638aab30f07afe3a693fb",
    "signature": "0xe38a7433516c591fbf035dc364bd25e85763e90570da0c4b48898c343fe62815689bffe7fe42d7d4566e93a7176e94da374d74681802a22d00c08eaea5cb0ce11c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}