{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb0aad2856bc8091e85f410a8d91d50e3a4ec80f73fe7b0e3d1b5bb747b906a6f",
    "signature": "0x11a1eff169b89ab9f0b100e8eb1d8fa0ccf4d6c379a56e3fdfe11c32aaccd6df102db263541503ccede4510c4d4aa2dba64ca7205b884ba930d307fe73332c4a1c",
    "signer": "0x1B3B5deE562Cca42D1Ba5E17c988Bc4ddaf24094",
    "userId": "607917902"
  }
}