{
  "manageEntity": {
    "action": "Update",
    "entityId": "383000133",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9c8920839c9699ddbbbfc50a5be67e8ae4741f9214ab87e7ffa4d3ed541be675",
    "signature": "0x07c63a0359b3f2de489759f266598cedfdf273ee1981e405e5b8e0dc0fc4d4570ca57e8046c99c0cb1a5d8412e02f5405352681d29e1e961ce5e9cf706d7af891c",
    "signer": "0xCCFCbacB122ad5a813E75b44623a8EF1876D9F1b",
    "userId": "383000133"
  }
}