{
  "manageEntity": {
    "action": "Save",
    "entityId": "697099016",
    "entityType": "Track",
    "nonce": "0x385abc4694cd8cd9d2ff3ad060b0f656a7c961445de065ccffcd8daa5e752945",
    "signature": "0xb4684fb9c47d1095abe5323e0798bffed06aea2b2c5d8a0b9c929efb99bd8c723405592bd90582fffdeb6351150b761e77cb9c3939530ab6d2444f72e8774a251c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}