{
  "manageEntity": {
    "action": "Update",
    "entityId": "504430901",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x73eb26420b85583c439dcbf1b026cd354e669baddb2a3fa292a7704a682ae405",
    "signature": "0x9fd6e90e34a3459acd6a022c0c016bea0495e1642465e788caccf343bec50fe132be971fde217e58431c2c1940c962e1bfd13034eb3ec2da73b3f0d2431705b01b",
    "signer": "0x4cB6E3a04248eEDa6Ce4f2a95AE4eF131b35fBE9",
    "userId": "504430901"
  }
}