{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x097408d9990dc489cce8ebd7a3bdcf9faf191d05bfc19225b987da2d04431ffa",
    "signature": "0x13b43748a97f28edcc2af055a4f48ed45bef13572f96d785af24d1e2d245884a02d68d4da5988b61b6422e85461916a16dbc6e950efe6085d61f89d8ca1107671b",
    "signer": "0x83D4c5b0035Eb6BBF319Db952dae03e49635aBa2",
    "userId": "144702338"
  }
}