{
  "manageEntity": {
    "action": "Update",
    "entityId": "190983722",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x19b31ed7a05a90e3ac07923bbc629e2110e365bb706fed67feebf17dc9a0df0b",
    "signature": "0xe5bc4422c8deb84722dd4edaac9dd99cc49a20ff603cfe1a426cbee79086c1397e8bb3bcf1f79fd450b88bc27b84b1938b8998f8a3389f93e59671a7243960f61c",
    "signer": "0x6c85548A20F07181fe5Baa6DA1FDDEC808971362",
    "userId": "190983722"
  }
}