{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb4ac2988a8fa2be5d042e26856c992fb6759b59440a53f7d3e87f530b7ca7596",
    "signature": "0x40604c84c37c7dc9fef5f72c1c439f1b7bdc58dd70848008257d14a0845e2d557ccf68b9b10a48f17e336e9735e19bb8383343e96a896718803030ce864d68041b",
    "signer": "0x2C2de00480394D7353a4AeC1574A9EB3F4B5ca98",
    "userId": "711498293"
  }
}