{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3573d6acf94accfb11a373cfc8703e82381efc943641a25b6339d6574f277afc",
    "signature": "0xcc7262c90ddcaef537c4ba48a6dc3b14fb3da38b2ed81e7c04cb143bd59dbad105111111ba1ef997a636515b08672b78b4918b372a1ad5f1a1ad608258ce4ceb1b",
    "signer": "0x62D2dABf16b82faD4CB0B2ac5f87f58d287B1fca",
    "userId": "640216975"
  }
}