{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa7c1ce38a1b623ffcb5317788200869050ae4379f2f6cdf7ccf340d7cca3ffa7",
    "signature": "0xd3379af25dbfeecd293c0ffa3707eff4e22d2f0b96256ba3dc2789baf41f17dc31763f87d57af2532fa3c9467a74183ca4ccaba55648e5c27b3d7ca21218087e1c",
    "signer": "0xFafA36f81706d6865F2F5a2aA1cA1c7a29eFCd42",
    "userId": "108520320"
  }
}