{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3f43a68a2cb115ca0340d64074d4af2d4496c81a5cc75527718008e2a17e2d7b",
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    "signer": "0x1B42048E0256C71956084AEC06ff62eC67297cE1",
    "userId": "930109695"
  }
}