{
  "manageEntity": {
    "action": "Update",
    "entityId": "16352228",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1de4b68743c502c617f9d710e4582dba4781952a41dc1790e67d3f8cb8322256",
    "signature": "0xf4debb6766f20d508084789fb00dd1daa701e5af9cebaf3abecab312a3e6ebee1eff27380a502ae7caf5f41bc5851c37ab88b097ad08922dea8a47853850ec8c1c",
    "signer": "0x8B2228a0319Be8E18BB73968673132cc1fB70797",
    "userId": "16352228"
  }
}