{
  "manageEntity": {
    "action": "Update",
    "entityId": "456087321",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierajopzcud4mctalbfvhelhsl2wxxwj5xzu7kcabjolx2bqcmjqjbuq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1053100257}]}}}",
    "nonce": "0xfa861a64952db6f1daccb58b4bbc1598c60efda9530453d7af0adf175caf7a9d",
    "signature": "0x4b954e0148979303a31209afbf68e6d8fde4d5caa0b7a288856b889cfe42ac150d334c431d03e684e58ba882c8d87145bf6c08a89e3e5947c72f9b2fd937f8241b",
    "signer": "0x14Cf60a0eab3a24fb7230Cc44B9a9b955d28E2D3",
    "userId": "456087321"
  }
}