{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0da6b6ada62ed574bdea8278ff6d39c05c7e9fa9d7050fb02682c96d58d13be1",
    "signature": "0xae191bf6fb392a2aa787370a7d4de6a8756c4637ce86dda25bf1907cb0b665765e0e3803e8c1ec9b5f1881b0c5d6cba7de61a0be3683f5d5a51d4ba62c61cad11c",
    "signer": "0x5B4864d2EEcc44e610326c5d6F07D0300C894A76",
    "userId": "627289956"
  }
}