{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x28ae70ec1665ad8e1f4b6b097d8ef3c68cce5e849b450ed30cfacb20971d6e32",
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    "signer": "0x0030C898DcDEdBbEc850125698A96f86592eEDFd",
    "userId": "809843053"
  }
}