{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd2dd7235ee16505b041f1ab96c65ea166b69f04f8c976bba64a8d211ce64e3b4",
    "signature": "0x7999d5926c51eede0e2cdb4b9cb84fcfb6b6f58ca7f7a36e93866555035dc7dd4e968f4c71c58f75eb0d3894bbe9c3d1b3d4ee1805345ca454fadbf4fb0ffb771b",
    "signer": "0x6a38b6541bA4485330815Ba5bC1FB5804257B5c5",
    "userId": "695485637"
  }
}