{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5d34f5ac7112b31d9a341703561a65a4acb6e9c733d0945ce3bbf1a17df4f550",
    "signature": "0xbcfa5f55e75628b4a86c319edf2d0cad8d359a17699c30632fb13c0f841736ff072a004d2faf834a30c2367ae5b7fcf0c861cf1958075dd279bf848dd430328e1c",
    "signer": "0x606cA456981B739f1F381f8859338fcea87f87a1",
    "userId": "779547182"
  }
}