{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x31d22c6760b93ebef1abf55fc82119f311b30200ca551d8c831b85fb50d27c4b",
    "signature": "0x46cd7e0e3529856d76fc1094bbdcb84f2f10d74f7f7f64e54457df2279366da15136b9f933a941462ee4e1bede9fe30a74e85ab12a157726e1f41acae0c3e21a1c",
    "signer": "0x44210dF90f2351eFBB3d6df793124876AAed872a",
    "userId": "692265798"
  }
}