{
  "manageEntity": {
    "action": "Save",
    "entityId": "573138457",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4e3052d8e26dfb99fa597b7503519fb685ea2c365098c0d5da37d62a2b39589c",
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    "signer": "0x71214aDcb582235538B21960fE9660B5eb90084C",
    "userId": "50737590"
  }
}