{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x201fa77a8fda9d0fc6c36cb1e00ea1a85ab170d219b9abbd980d941c58c17d56",
    "signature": "0x1b5dbd4793a5244c0e9220667aa46fda49d8eb57946f3d702b7e420cfda90aae1e42f6c6b0e6e4cc03bbaaadb87af35939e4f8e57983bfccebca0809fd11a46a1b",
    "signer": "0xaD2943cf8b72499A607824F1f47422500Af21895",
    "userId": "903623679"
  }
}