{
  "manageEntity": {
    "action": "Update",
    "entityId": "512140280",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1fba0490b4ba3e42407bbc94495d75f194380f6f2847f4724165b6d28c788d6b",
    "signature": "0x563753a64e941c45df84b2c5ec719c7f7ffec26130fafb24c8f8022e0129872c3ae814bec229fba501d42555de048eb922917536ce4b3ba80bd19a0c6a4f9ec51c",
    "signer": "0x0C30f089671423bBfFAC9AD524446bAbD9a59f29",
    "userId": "512140280"
  }
}