{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3a4a0ca5b7d8774aafa30c1ef700441294c62e7a8ae39b4e9c1775ca44730dfe",
    "signature": "0x433cff8506dff3be3e04a363b592bc46863f4c14bb8163f06efcc90ec2300724423a2bd652b4ed519c4af98a9122fd7a2a413f20d6e8bac251b7a4b8c6fc6a3a1b",
    "signer": "0xAdF56fa0D58072436769dF113a4F94F246c6c756",
    "userId": "385708679"
  }
}