{
  "manageEntity": {
    "action": "Save",
    "entityId": "355864",
    "entityType": "Track",
    "nonce": "0x5f968de2236f60882b02dfa18c9cf07510b8fcf050c0a721dc105fb769fefb2d",
    "signature": "0xae12b2b5a5cfd805dbad24925cf7af04513192d4f9fc56721752ca175b5ea2f90fde20cdd739c65686007be6c8d1c075766ee8fdbe9e369c14bfea277d9187641b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}