{
  "manageEntity": {
    "action": "Update",
    "entityId": "552753858",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x0e785c00a2e7f87aad23f8a9e6e7febe8ae9f41928d5ebbd3bb3afebb37f55b0",
    "signature": "0x133d1ab7eb67905c4601bab0053190b911a8fe2578d945acc96cbb116bd9102812b4f4ee378fe27aa1583ac29d8d0239a6214341173a69d530d0eca58ca8c3b11c",
    "signer": "0x8E3A4E1A0d1Aa7628E0FDbc872062F921A449403",
    "userId": "552753858"
  }
}