{
  "manageEntity": {
    "action": "Update",
    "entityId": "570473743",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xef945525c2d79f4a56909de15942a9e8bb52eaa08875bdd6a4f9bb24b7ec9be5",
    "signature": "0xd4f9178ada258446f05a87dd8052a1a84082b271b11a04f67613d8f0fe63cb1719d4773bd1cb1130686cb531474aa649ebaf484c9a66a8f36c214377cea9b9421b",
    "signer": "0x457faf19001FeBeC632F2821cA30Eb1cc21eBAC2",
    "userId": "570473743"
  }
}