{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x66e03bc10c87fbc1daa6f241ca5e4963f0882dd2bee82c6f0c4d30f178dab0a7",
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    "signer": "0xeDfBE8692224c4fE2951E97418044B5aFE3087e9",
    "userId": "16214258"
  }
}