{
  "manageEntity": {
    "action": "Update",
    "entityId": "754738576",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xcd91b12612d8199dde66dbc37c647ac5349eb71bd1e433226108f1624e3ed9e0",
    "signature": "0xf7f890cc6b7caa4bf6d89a22e3e65e39953da143f7714031e6ec5eccf7c2e071626611e7e043d7b79b19e57345a09296f6ff9e6db0313936ec1222dcd4c39cc11c",
    "signer": "0x0527E71aBe15614de9A48A8e54D732dBA4C8b009",
    "userId": "754738576"
  }
}