{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x34869665190b63de079cac23999905a27dd447a6a8df5f27e3310ab0d6e49fb3",
    "signature": "0x14314f4e47f2f4607c9fb7d6f72d53ab9a6d33aad1f3a95edee67ff2279e12b87bab72c37992e84df565e279c97aee02bb7991cc8058952b3566efe9cc21e3451b",
    "signer": "0x78CF3E90d6e66C1b735fCFd75dE4e88c3F67415c",
    "userId": "587496127"
  }
}