{
  "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": "0x800bba2a008ba0b13824ca3fa86ada4d986e39d4c5542dfd1bab2e4d578e1847",
    "signature": "0xfb3c78dd9c0ab1c81c66ebcfc8ef3885d46421b40c10f848f4cc15f0b84797ff047cf946071b35c27372aac2af32d24f3d3e988f17f5336e38af69584eb7758e1b",
    "signer": "0x14Cf60a0eab3a24fb7230Cc44B9a9b955d28E2D3",
    "userId": "456087321"
  }
}