{
  "manageEntity": {
    "action": "Update",
    "entityId": "502388335",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf2554d11a951d909047c744638cecb35178647a1da519ee456a029863675b5c5",
    "signature": "0x02d068a7a73819b609d0f8f39ebd504514d77ffc1656438095ebed3b25ddd7ce6502899ed6341ed94f00003f1a669de62df8436257b1bb4b67efbccb0589d0831c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}