{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5bd3fdc6c99da2d95321b6be0dfbd6d57bb0f4058b65e1d1aa065cfee118caf8",
    "signature": "0x5e2455b81619d74ad128302daa9d95b18ca89467d14a004d12af5a59a320373338aba0e1c4b8a05f636e7920c9f53cdc25a48308bdb3cd6fe6184e144617efaa1b",
    "signer": "0x28bFf1Fd30814d76B1D502B7Fb038a92E17aaE50",
    "userId": "819448182"
  }
}