{
  "manageEntity": {
    "action": "Update",
    "entityId": "645381997",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x339203ab768cb2607473984a82654291e308839c6930f3542511b43c66c5aa18",
    "signature": "0x2a5b19c5835ed50d2ec7f300aa8f6214b3913b17a7bd60713eaeeb7faf093e7e4be37d66387955fe7d584a0ac8bffca3a42c331225830b9353c58264f09b90a01c",
    "signer": "0xFD97dAa07E9170298134EB66b9b5b688fbb87dAa",
    "userId": "645381997"
  }
}