{
  "manageEntity": {
    "action": "Update",
    "entityId": "515097345",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe7811a772d30d11cd8cec7df5d996fa99ef0157c8cbe0e5d0c828d4c1b7f8f10",
    "signature": "0x0fb031dc891a3c79376d0d8cedac8ea65c3101aec4a6ed3d364e973ca7381a035412893854c43c2e1e99edd4b22250416225f2c5e59a2be059cc0432a001b7951b",
    "signer": "0x3779c0ccEAcffc194b6C8613B9e3c7cAF9E94399",
    "userId": "515097345"
  }
}