{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x834914f375ed931f97b58b0d0f7102fb0903934a4690b5a38d15671098483dda",
    "signature": "0xf2ce4f59b62000ed4e1e36b514c8e14c92256fbf3d109eb0274018f3ff61e2d5711f1d6acb248c85825ed3ea15f64a8dee03013c2e3ead7ea1a59a369ae594921b",
    "signer": "0x8494914dFD59D1237AD86046Aed4196f092108E6",
    "userId": "924491469"
  }
}