{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x69f9ff4763a07526dfc8e8f53cb67f245129cb33f0c93c73f487dea8f0063854",
    "signature": "0xfc5dfcc166604cf6fb02a290c1b27a0f36eae1ee043ace6fea9d7ed2d7b0cdd75084fa6c65f06eba8627033d291736c6f80354158a816ee21227cf264f3677b81c",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}