{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x500a1b27fad92d87a4c90100ea69f0dd70ecd4014e790c02e9c9c1bd07a9f6b7",
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    "signer": "0xA275D81CF2e99e1CBCEEA244Fa82421501e665Bb",
    "userId": "733215727"
  }
}