{
  "manageEntity": {
    "action": "Update",
    "entityId": "603916020",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x12410052e67439698ae4eb7aeda2061e7d0a841b7d5a8798638e2e91b92a49e5",
    "signature": "0x8b624e0a4967a659363bdef943d3a23118a140754a5745655697f821ff9e0c1f21ccc4ffc981e40324deb904c4d1a8e29a5153749f37516a981259dafca1c1ce1c",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}