{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0219869cc2abb05cbb1143fcabfda388c0f2f6f71d679f9c643a586ddbd10b19",
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    "signer": "0x58Fd15cF8652ad74664BE5E78b4D09ab32Ce73Bd",
    "userId": "6838510"
  }
}