{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd2fb171c2d0d095cc2c652e1ea8901b5446760595abc3a6ff9729f7ca20e5b4e",
    "signature": "0x036a969cb906a275ca331f9476584dda200e0197e58a50e8b33b067e5039b5c60597fd36e367fa65b2d9f4e763a241dbbbd551d4b88adaeb3a4436c78be014001b",
    "signer": "0x96140a0C98421af577644FEc58eDDf34331B3456",
    "userId": "927608750"
  }
}