{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x56b3f970a5bd228be43115b20ebe46fec10492664480b4f6c2f1d915aca4e169",
    "signature": "0x342db71e4067d485438114e93402afbe5a006967a679a93290fb00e92a16e5af28f8072e40a20e8c7ca5dff349663e70e2de94eadcf6fa3c859eadc28b08d25c1b",
    "signer": "0x616810C6C7bdfF44008229BBe24fd212CC6d62Da",
    "userId": "822716103"
  }
}