{
  "manageEntity": {
    "action": "Save",
    "entityId": "22529891",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb6e16d3bdb89b7582e9504d1e9f9c7fdfd2ac7b258e2563516efc288991d80e3",
    "signature": "0x3f3112a4cd6d4bcee9efcff00266f53427b37fa7b2a3fce463dc040042a448bf2b3f7b138a6ab07ffadb7e3f3c9514c2163b742c1cadcf26cb54b90dbf88aa381b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}