{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f1a63568149535867c7f91ecd86291a47fb879e5b28c82ca2341eb81acec3d1",
    "signature": "0x18b01f8e3df144cf017175d671520f035726921a70498061a0f3ed3ffefb0b623b22b72357ea147151238e9ad292c734f544bfad573319c4efc003c66f179e151b",
    "signer": "0x00496EecF8F308C7b04E71Bc8af71cbA6aDfD6D5",
    "userId": "76880795"
  }
}