{
  "manageEntity": {
    "action": "Update",
    "entityId": "438517823",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9f0db505e792eb91d08255a5977bead7dda738a9fe30202d73a11df7db10e1b6",
    "signature": "0xaa1c9fb208f90b130b82e01545bba51050c2ad7fa50bf68571ba4f7c36623d3a6719186960a412b74aaee5124fabc57c13b59d09d118aebd80c75513aabb654e1c",
    "signer": "0xa650A694c232939f5bFCFD7BD7ca245060bc1b52",
    "userId": "438517823"
  }
}