{
  "manageEntity": {
    "action": "Update",
    "entityId": "596794655",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd7bc5d21b5b39b040722bc74e504d1b229dda6f6e1aebe3be4f248bed12f086e",
    "signature": "0xda6ec1a7da1c977c83fe1dd4c84a873a3b68869f9a2ccafdd7c361da9ec6000b7efcaf508f9cc1e831089d87f30a2747904f22402d481c18fee1da4dcc4e341a1c",
    "signer": "0x21198aA949A873f1DA666C84494858c09D2914e2",
    "userId": "596794655"
  }
}