{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x042cfc229b1bc0949f85b88eaff9415327141d9f96657e5c17e15093c6d9fc44",
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    "signer": "0xCA12d94C7bb55aD7336C5790f225776aeb63e855",
    "userId": "399217822"
  }
}