{
  "manageEntity": {
    "action": "Save",
    "entityId": "140294347",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1538e815b9ea5b05f9522575426b6ecbcc63a2783f7cca8e7c9a08eed42c636f",
    "signature": "0x9a68ee192587fa980a8c9d5cf099f574d99858bc76ab1ba671b9298215063bcb6bbd96f0c4c2c04967a664dc3ecdff0eb188e6a08085282dc0259855359b4f8a1b",
    "signer": "0x6687B667182cfdc5646f5AEB14a9945c9b1d3A6B",
    "userId": "720896085"
  }
}