{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe3dcf03355a0825018da897b5e76aabe81979ff7ac209765813c7e1d3520eaae",
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    "signer": "0x736A5D5caFc62d76542717D2688Cd344111165FA",
    "userId": "560390284"
  }
}