{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6c6dd9e26fcdafbc2cf5e0974709c255ad8b94028163d58bbd3388ab0653445c",
    "signature": "0x8991f2a16226ce27ab51c7a6acb6022d0d6e45c596289e97025d10ae96a5904b6fd6caf8e8488a387d661a47b47313ee846a232bce43997bcf6a5fcee4dc52721c",
    "signer": "0x09f046A8196b7968152f3e74b299DBCAE43abF66",
    "userId": "21345399"
  }
}