{
  "manageEntity": {
    "action": "Update",
    "entityId": "600177076",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4e12058350fd07d03f61bd2cd9b23f6dfcb918defef88a8cc6ff9cea49489bde",
    "signature": "0x9658a7c4a51bb4034e4e9e5c546607e9e701a9245ec08251047b3c5eb9a67d335e3674560c265c66e8e323080c9d09293263ee32bf4bf7f535a5b569dcdbe43f1c",
    "signer": "0x6B2878936294DCEfb186B0793a0bA1b40d6CeE1a",
    "userId": "600177076"
  }
}