{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f31f9f7629555c771c70c174b9668ecd95a01f20a6eecfebcd0b0a19afda68c",
    "signature": "0xd0ceca6e91c4a656cc67d5544b32230220eb05e9d0eb268f6c74af4aad130f6e444e994631ca71986e315b694c2bf49bf880fb8e9bd0b4d1aee8f0d6e78e04f71c",
    "signer": "0x3392AFc96B7A271F8841162275e7AeC6E4Ac26CA",
    "userId": "203716707"
  }
}