{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe81a82012786c4912465aa113de22a5ea20b6116d8a714acf67d00926184bad2",
    "signature": "0xc2b0f47ce5d2bdb943ad16ee04986b943e7050ae200dee19475a895bf2821ef158e0417d4180580f1db49bf64266cd2a9788b80fe66e8bd8c7a73db9d32a95931c",
    "signer": "0x554Ce8caDfBe09482850A1052300A0A4617252AC",
    "userId": "272476326"
  }
}