{
  "manageEntity": {
    "action": "Save",
    "entityId": "2100763140",
    "entityType": "Track",
    "nonce": "0x150bb3d563f2e6fef99a590f4c19ebdca3856ccbf497cc0e84192111399e915a",
    "signature": "0x1c50b0ddd998a2f5e2a16251ba698bd2b571cc199acd623723359a20d4db8fc0555a32ae7a2ebf0abf879704fae1266a254ea1978f1ab8c4f5a87a4b6dd924b41b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}