{
  "manageEntity": {
    "action": "Save",
    "entityId": "332553",
    "entityType": "Track",
    "nonce": "0xbc2f6f761412739eeae8dfdbbd388941705f91c2e110b999c25408372ebdd901",
    "signature": "0x11dd78e213aef4e9033d5032f96322a91f8f755d98c30ea980c4673828d56c8b2a9b1f113a7d6fcca2d8cd96824517c6ad5864109a130771855f406c22d815a21c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}