{
  "manageEntity": {
    "action": "Update",
    "entityId": "684451248",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2007c9a1c18d9361a619d273846c5d304b73dcba7469a06a7775745247f06e6f",
    "signature": "0x31d69fee3dd9a160bceadf0868997c67882f0f77359ce5731c4fea7a50fc5a4629a2c80bf4c4ede9f2d04e2f68fc63dba3121f1ee4358ec01c6141f00e3ac9ab1b",
    "signer": "0xF4Be1e780c06BcF21b6815839CabF01B0c0e7606",
    "userId": "684451248"
  }
}