{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x319af36fe68dbe74fe4dfca8d5eecad052e53f6770a5524049e7c5825b4cdbb5",
    "signature": "0x648dd394e1977ab16f9cc218c3ab0ccfa3b285a2a8cd6426d3dc94eec1cf9e22581c295820fa485b8eb0ff609b1d31beca4e71467d0d8bc3521e8abe1f1f0a151b",
    "signer": "0x75ACCD4160aaada206b4dCfA68E88187C9ba9A0b",
    "userId": "799571887"
  }
}