{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd915b9f86b25e4178b38596322bb3378d22a611da1ac0871fc505504adaadd50",
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    "signer": "0xFf11BDf758Fbf6d7fEb3FDa5D3c58F7E7C720fA3",
    "userId": "49482808"
  }
}