{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x75d076b9cb850e4bee9c0701d51cb16a25d9e3a74e0e9388ee6ead8082ac75bb",
    "signature": "0x189e619eb3eebbf9d29c2333dfafca98aca5d263030d3c927f2f78c4ef779d54675c919c944dfad475940ecdb5a039e1235998441e446180df7d60f1f74f0e581b",
    "signer": "0xa2ffc8e51e293f70D5809382fAa1fAE75B45ef96",
    "userId": "28859677"
  }
}