{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x04f4ac3775ee1a84d8b33937d78a52b2eabd12a252dead3a4ccb802b16f88629",
    "signature": "0xbe4fb18444a5d65b625f2d5469872e1fc0eabc132d03ee36d8ea95e4aced6cba3da2dbc3561316f3c77bc52d7f84f7f11fc499436da55cf5fc77a256d201f7151c",
    "signer": "0x1d4A651135EdbA316DF8Fa04DD51e14B66181288",
    "userId": "786376397"
  }
}