{
  "manageEntity": {
    "action": "Update",
    "entityId": "646988261",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb03cfc4a4101ff400021d215ffb0ed308270e0aefc0ac9e2411d3435bf2ce97d",
    "signature": "0x14c0e10cb43d83bfd5b01a95afdf4d366487821f82d928328a52c7c09f9129e25d5f09f1a0c8770e4facfab2024906a3f8f13bdb8a08c8a6510784d4c2b954681c",
    "signer": "0x215b9229F9cd650Df3C8D6f55633614FF81314AB",
    "userId": "646988261"
  }
}