{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1134bb8f868268df6380893b072291a7f900072434900f39b13498f7ed9f8d22",
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    "signer": "0x416a5C2ea918764e4F698AB830C9c04B86cD3464",
    "userId": "605459163"
  }
}