{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdbe4e113873d70726a998e5d0737f7d162f272d2e967cfe143728a1ddea34787",
    "signature": "0x92579e11dd77f77128c70d3050b7b051d43150e7848482712227a9f6e2f900a01b264b44d85d2a4f397dd8ea99538361556243b00eefda046b7c84d704845c2b1c",
    "signer": "0x6B4CB8664E41AB502212155456Fe4feEDeA85555",
    "userId": "463162548"
  }
}