{
  "manageEntity": {
    "action": "Update",
    "entityId": "397438294",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa63fe1d8dd6e1fcc60e429d0a78413ae426a912c2974f114f332adf2d1bfe2d1",
    "signature": "0x748fa27c11647086c1521d5432b73c821e13b07b7b6a66fc1176b592963ad00f7e37e2e5cec4d233b59a38f5ad3a62404d3aa59335df69ac54152ac12d73fc861b",
    "signer": "0x21Fd9B00abe46D332aD583DED844CE1b04f07047",
    "userId": "397438294"
  }
}