{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x542ce9a56cd0003a4d1e3340a1eccc257556429ecacf9068c913d6a0ef94d29f",
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    "signer": "0x7bd965676A9FE2484D302E678e4A9cBaC7581df4",
    "userId": "679523345"
  }
}