{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x82ca8e42c2a06203fa626d00a1a01372d59b32cf2ac60ad4ebab864d5905e852",
    "signature": "0x3d2272fc81bae358d7c94e009ad20ed42052009f2e23e4f1d10c17b7db7c7d231b80ee77d89b6cbf0a0aa71caf8e9a93c913ea5bbee2b3be8368f52f2ccd8b2b1c",
    "signer": "0x54847cD30cEc1B837DE67e24799c02C0D554FFaD",
    "userId": "201322657"
  }
}