{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6e9f20f892fbd70fbb6a0939135cf504ef0efa39e22072a6ef7b0874e167a5d7",
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    "signer": "0x07cb9FC9147CF1353b74d7CDE2e0608F9AA1765D",
    "userId": "531346517"
  }
}