{
  "manageEntity": {
    "action": "Save",
    "entityId": "1886116650",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe7aa6ec13e90eeb9f85b8f2afe9a4020c4ad457fb17a77453a1db208acd806aa",
    "signature": "0xdda4fac08a76c89120aa762ca2184da61aee032ca0035d7148aee35128b5ea8220039052da31bbfd9aaa4270d2b1f8053b70676ca9cd32f521bfad2ce8f0f34f1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}