{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xca5b2f34b12a926517c41df8b5f4f43bbed6a47bde4ea9d95e3537c80258752a",
    "signature": "0xbee9d5dbc4625114f09b0ff2f2373317a584b7d48b87cd6690cea4f6228493712b464b6ebf5cac00da3efd3ad83ba7acb19358d72b8e866f12796ab113e6c0bc1b",
    "signer": "0xeCc7A1b9504A18Fe797f731a5137dd813D09b462",
    "userId": "297034379"
  }
}