{
  "manageEntity": {
    "action": "Update",
    "entityId": "512509802",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierawxkrzoxmvjhncwcxd3mbp7aasps644z73xu3fgv7rkrksxicw4nq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":17673}]}}}",
    "nonce": "0xf17d0cd5ba8126252eb557d3042e064dd36edbbfe5fb3c5907aea8e2f7908f68",
    "signature": "0xf723b8cf411c84797247d8ee39bd32d72e4b4420534b743024d33a40604c9a570ea2e83025f55797f3c63eeacaa1a22b2ef728847f8ca86e8f698fa8826003921b",
    "signer": "0x48141dA6cdb039864107fB4e7E87Fd5AD9A48cB7",
    "userId": "512509802"
  }
}