{
  "manageEntity": {
    "action": "Update",
    "entityId": "300815705",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xad806dec8e16bd5b5308b9021f4da1f5fa17a5d057ff92ad939be49e7b19a750",
    "signature": "0x98a88e5d1313762b493ae7c0133fe1a1be88692232f9b33a9321f7e5eb621a7145febc482086ec3e45edcf077edf7695cd4ae16ce5c012b174a8b5f2b223ae7f1b",
    "signer": "0x17E5Cd991203390519d2FC47aDbaC0DF4B27bBe3",
    "userId": "300815705"
  }
}