{
  "manageEntity": {
    "action": "Update",
    "entityId": "545790265",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe388c956d6e62d9d47b81a6faeccbb9bda380cbe3a6f4f40bbbcb78822ae10ce",
    "signature": "0x685e943b89dfd00ccc6b77288273322513b35e13440e84150abe2c0ad7119fd63c78cc32ad66f79be758a303baf0ce180e5112292a95dedbcfd5dfcdfe2c31771c",
    "signer": "0xa568e0f808c5B9E7C3aBf719dfA04751be8A94CD",
    "userId": "545790265"
  }
}