{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x94f138a433d6753b07bd802f857c1bb8836d7707e766bc461b96139ec3c51176",
    "signature": "0xd9a5e5c805baf82581683f2ed77704711a36ac07d4d1afd9ae1598065da708a116051280f38a0cc89c884c6323fc36d788470afdd8d826b710ea9880ab3fceb41c",
    "signer": "0x12764976312081412a5D2a854e6e46Bdb3cc2526",
    "userId": "879852542"
  }
}