{
  "manageEntity": {
    "action": "Update",
    "entityId": "554920508",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x403b522bb9bd09039456f036b0927f49f82a5e72b4ec2ad8dbfe56a68214dd82",
    "signature": "0x9e28b254bcd43fc555fb79b1b8d222a54bb03a42af29700678ff8300f128055d7cb084d6513b1ae4ac4788c9449ad7a0ec70db0de13e54a52a0760e01c6e0b111b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}