{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3f87c9412c756520299c22e214d66145a1af79ebcb9c432bd092e20840111bd9",
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    "signer": "0x86AF6e172e6cb256820FBA3d2109Fb24daa294d3",
    "userId": "423497533"
  }
}