{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd39bcaff1f115feab3f77853bb0e91789b9a924eba4edec2a0f205304f6b2646",
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    "signer": "0x510515D9ACfCe56aF1F9b321432fE0D3Df77Ad97",
    "userId": "901484303"
  }
}