{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x77fa66dba4e90669b4c1470b4f3421ff0012f12e13ad25bb765a663790020b59",
    "signature": "0x9c50715de2c6a335fbfadfd7218f9e789c54cdf9c2921da13dc46ba8e9909db5620bdedd066cf963457a2035e284a3f348e75c0a38eaf2e22650170c6832f11b1c",
    "signer": "0x109fE98a9688F2ca8E1b3174Aa26f06bC64D2a80",
    "userId": "163826447"
  }
}