{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfe5887568bade5d9554a6873c518365d952a73961da5d74e6f75d5636b334fe7",
    "signature": "0x9a44dafd1c1fd93c50a0561babb06e6181f9977ee052e021fda3712767a4b1381eb37922447739b9e741856e1e086d6023d6f80b5cb925bd0a1d9de666b4e3021b",
    "signer": "0x8AD258A64f19f2702E1edE539A534733eae80a1D",
    "userId": "526915722"
  }
}