{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc5fe9cd6a5bdd138ebb868fc797ee15f64bde142b500874280472fc810134cab",
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    "signer": "0x4D037f463591D15DC8263482551C8a41b0367860",
    "userId": "35038067"
  }
}