{
  "manageEntity": {
    "action": "Save",
    "entityId": "514661078",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xed135c818bd4522d8ebf156836253a9b2acd2717ea61009b70bea3ad3e19b758",
    "signature": "0x70337796e7e9962d206d162ceba4e93e4ab8b73e3a46d7d5ee0f07db9811a7924d5bbf894afead720cb1d12c0a9c449bcd17784a213a1fb889c751cd26cf9ff01b",
    "signer": "0xF7F56DF4D8a2Ae2BF9Ca645DC684f84c37BbDaFe",
    "userId": "116272245"
  }
}