{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1ebc667d66f3a5cdce929e229009f3b4826ba3166440efa406c12aa7b59b6355",
    "signature": "0x82ed562fb0e1b3a0972648d0778e248ccda1888a9822e380daf9906cce6f9c980dae8706f3e1b5692e272e27f7d2ac9572328d76ce8f8ec18e4176b3b83ba4401c",
    "signer": "0x38eF53b69FD00dA5ef2Eec1bC1a2A32a50B54A8D",
    "userId": "592928275"
  }
}