{
  "manageEntity": {
    "action": "Save",
    "entityId": "355751732",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x283494c93aecd5c180864673270a11f8f2035b136da30b553ae667563c277c72",
    "signature": "0xa7f5ac79f2a67c9b1eeeb3c7c4cf55506706d89fe41ecaba154eee0d11f459b27ca6009da6a4f07927a2be9cb5c992259f26d93b43a22199fafcab38db81c35a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}