{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x86f172c252c12a11993d3b5194732904482a4448724756adc22fe180e201ceab",
    "signature": "0x9725896c4eb15578edb16236de557f00fc3f38cb523ae78ae0601b4907026d2f03c103b6bdca8c7ddd78b04ba95d25dc8d8fbd3edb4f81e29dc7bd3a13a497cc1b",
    "signer": "0x0df3836f76f6DAE67d56d51BfD85a43D9e8b0958",
    "userId": "990130662"
  }
}