{
  "manageEntity": {
    "action": "Update",
    "entityId": "453055507",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf8def9ba4d1bc26e1d25cfd94bdf97661b8c26c0bc6ba1ab60453d799dde4637",
    "signature": "0x1ed0e1f9da58489e49d16210e02b15c3a7c58bf17785d11fc28cc0122f1f70334307d2e953d114d81faab04830e86a1d08f75a14af936ab8c76456f424bd74601b",
    "signer": "0x68e36121996a3e2ce884bdC13F6F35b8C5d6aDfe",
    "userId": "453055507"
  }
}