{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x09fe9e58b63d767257b949307619655f018f55dd55b0948e20ce9f6446716aa6",
    "signature": "0x3c9a8d015f75c363222c1a5a888bff382bcde8e5c2f8e82a7190a9a1f198fc5f0eaaf5428b9f0e72debd2f5f3ae4e831bdf3e3b3961a7620bcccb73d507f36121c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}