{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe0182812fbc71c3cd05707ace56ac02696395f7f964979af4ba67f21a15fd2d6",
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    "signer": "0xbAD4cCe0b2dD0EfbCC940532E2B728D85F310c01",
    "userId": "56702780"
  }
}