{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xabcb2be7565ca4d0ec68eb8ab87a7e30147e13f8a33af9d7550f1df3521879a8",
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    "signer": "0x8b61B87EFfC875d065c2aeFDb0424BA7d522ce17",
    "userId": "723815891"
  }
}