{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x28f58268b19ac36836a36501d130136543f31a31887f04b4a03dd0cd5b0e10e6",
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    "signer": "0xEF1Bb589929B6bd530784003c4a665D59aFF93ba",
    "userId": "270354551"
  }
}