{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x25960bcc1063d120c600a0b068bc9413c01031d65185ccc40eff43c87049d46d",
    "signature": "0xa1253c5bb33ccabbc262ff610391e62d253536372bbc92547bbe0f8e9ccf122119ea1dd0d0a187df4f32c8fb6a9fdaedffdd839118dc8b281737c5e2d423d8721b",
    "signer": "0x25Dfb5B0D7CDE92b65C3EEB690F0d4afdd575ae8",
    "userId": "253005"
  }
}