{
  "manageEntity": {
    "action": "Update",
    "entityId": "531420291",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa9b1d8e794fe5e4ab2281dd3ee90afa14410a883180b1888b68a32e763712edf",
    "signature": "0x5e4464f19302afb9ff4082ba46b1d196df0b4da35f2d7c71d3056088d3e3c9e951a0d8f7aa8bb75ebea9b86874e239b28e3aac6e3e39068709c97c035c57c6ac1b",
    "signer": "0x4fcC461734A738D49dd2157C29fB2318fEFe394a",
    "userId": "531420291"
  }
}