{
  "manageEntity": {
    "action": "Update",
    "entityId": "251000392",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xee75ef811e6abdf8de9f11430fc4677eef2e4f36a6b2cc5020d44402d8604102",
    "signature": "0x4ab671e67519a9521360e94fa325307ef4664b46597976a1e3cd6a8fa9f731a03c164d1b9a23dbf05fdd04e168921aabbf4de771d621032b03262ab2c57a12501b",
    "signer": "0xC22F133187823f83f32A7ECd149574160C9619C6",
    "userId": "251000392"
  }
}