{
  "manageEntity": {
    "action": "Save",
    "entityId": "1264696744",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa2017fd5a585f896db5b7ffee6dccc0cc56b6de0371e0c663db36c1185a632ba",
    "signature": "0xe08afb22967436c351198ba3880b528dee89167cdaebb7c434e1ec432859ddb027ba25ca87a2a6e2164870b1e4e526befde14d685875235f7f6345135f655f701c",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}