{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6b7152dec76768cd7c24f303cfe78c38463e8c2176fc8a824ecb1f0047b015b1",
    "signature": "0x17ff4abb231ecac29969f0d5f12e52e0d3e3261c1c673578301a20f56fbe9322643256a3273f3e7af811a1e1139647c3c0fe79de4aceeba69beb1fbed0303e141c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}