{
  "manageEntity": {
    "action": "Update",
    "entityId": "521950017",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xff713b294711d3bdc07e7e78d56d518ea7c578e38a9a8ba9fc69ac80d2fba318",
    "signature": "0xaea94e5248749d124e218c4e00d7bf8e369cc271e4931aed8045e4847f57ca9e15a864269cfaf9ced62ce9a9f0aa7b3e3bda1340acf8ed569a1c6b54950925ee1b",
    "signer": "0xB3440fbFBF750C33EaFF74d2B67dB33Ef0a6682E",
    "userId": "521950017"
  }
}