{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3eb51338b1c47749a9662874e08f829debd79aa36646675645c47e20839f15f6",
    "signature": "0xda0c886be064cb1866942dfa44d28bf3c9b00b4656d14175791b9cd40caebf0120689d57e94d89f3e60885ca84801e5f77019fb1e7112143f8dfdf65814d97b31c",
    "signer": "0x62d29604d8672A4CB15798660456f269B69c37ee",
    "userId": "413550021"
  }
}