{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x261ce414d1a36e397d5fa2b0f3071a6afb245281a46419686c8705fde0d89237",
    "signature": "0x1d5754292d85d6e057fdd3513fc671510193b53260b8c3c262df7d9e08cbd9eb605e239e9901974c7e6385c8f090ce023b330d6e40646400e1d3ee4618ae54891b",
    "signer": "0x8506BC3f7360B24a31b01F49532c54495a8e89AE",
    "userId": "167751987"
  }
}