{
  "manageEntity": {
    "action": "Update",
    "entityId": "603916020",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xbb2d25369a04c0981a5622ae02df7af04bbfabfdd962806be1ebbd14836fd6b9",
    "signature": "0x9da1e7deb74bd6bdcf71f7c1cfc356be8da51e8b0d9a7dd708509798b024bcbc7a0c7fa6a067b6a4b983b0ab478e55b46e267ab621101c37bf5c8db2c1cd670e1b",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}