{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc8f2d4ae79ce3f89d023a11172cc400ddb65226d4252b4a960761dfae1b27eec",
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    "signer": "0x0F7fd9c30ABe9ca5535EBc11DbDe0ec380e78d82",
    "userId": "924243662"
  }
}