{
  "manageEntity": {
    "action": "Save",
    "entityId": "569631061",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x901b422ee82f2fe706a04d5174a2045e8cd71fb1767040ae332741ca824117b5",
    "signature": "0x4b6daf70d6880744c02f13728eca59528dc19f4238ac1e3526d3d95ec18eae1b1c85bd5ce60edf70648b97aa5d8d2d0d4faea209b901f51672cbdae3d05c53bd1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}