{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x984ff4a9f284d310e73688f7f16d3029d6bf148552433c5ac4b4a3708a47efe5",
    "signature": "0x24b9c4e57075764fcbb1fc9402cc22467be33eaef3395886686cf09d8a2551d471eeb747897c0d1b3c008a6d642bdc3be3f51a82205237e8611119ff7f591f531b",
    "signer": "0xE98467d4Ecec97Ea2c684c0a31321d7ac9E157bb",
    "userId": "680543366"
  }
}