{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1fbf758c4d9bb3dd8cfd32d9ca76f446d9ea1957550c8a80b74cf1fbc34301af",
    "signature": "0xfbb1f6ac1f2560717812ed5825828a18dd70be44338be1c97a5f1f951c63a15a7fc72ed38d219142fe126cb878dcc276f4a2cb2bcca8b1d2867607d652b906d01b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}