{
  "manageEntity": {
    "action": "Update",
    "entityId": "421539700",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xdebd29fb8735511a575465e1dabdf8d9ef695c8add33583979b2421b0647d4ef",
    "signature": "0xc4cc61d44a9a4930e71e5a38320a8ce4d93a426e12e89780dfe623f1361fd94f79a0ae4ea2c8ace43663dcc101375598bdcbcc794efff0749ea9d721058df9701c",
    "signer": "0x9900c072ee2C011451487770417b5A59d57FbE51",
    "userId": "421539700"
  }
}