{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa44622d8e85555a9c93b3fb3125af5af9d3c21eeb6ac51d57e743c67e815e7f4",
    "signature": "0x5a35c64c7e5780da1ad964b978d7d5ef9d4f60a416bafc9a6f88f7e8eb35d0f6451077e17db39191ab9d1f92d0bf682030a073d76648448192ffe16cf11ff8a11c",
    "signer": "0xfb05BA48963ECA0E36467Ea56e40902104c0F9eB",
    "userId": "798634554"
  }
}