{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x484bd4ead7a828d47642f92189d24390b81af4fbc78c63e41f6be91e2e5a8fef",
    "signature": "0x6e2f8652c608ca0e549fbc50d7acab342b8d39e5f057b60eb4fd9562a6dd5cc32fe5cefc70900d29db2739c04c643f6b3dbcf54339fc7a15091f4cf03546903b1b",
    "signer": "0x675366e39d19EbC2D10f111F5A52397F7f40f625",
    "userId": "829793830"
  }
}