{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc72c957db7551ec4be5c07007fa7b05359fbeea1db80a60b69be3c2149ceac5e",
    "signature": "0xad0f87690cb9a7581873d9c25d5073a50957cd5253c1dbcdf26c9df24180d6804afe96bee216cd13ea5d7e532b4fd482d8e623c03052f6bff226f642972f67dd1b",
    "signer": "0x9053379e994f9cA132135BB6Db06677C412EaCF6",
    "userId": "979575918"
  }
}