{
  "manageEntity": {
    "action": "Update",
    "entityId": "173028850",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraeejvmipoppg5kosjacgxwt725ohbuorzkmyf27bli4kwtjme4viq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1453686152},{\"type\":\"playlist\",\"playlist_id\":1098914936}]}}}",
    "nonce": "0xe68d4ee4c34c5e1dae051b220bd48a3df97398ff20df46197bc7167152bc77b9",
    "signature": "0xc91e2e0c1a2e7ecea345ba7e8070488a89643a06f83bd28d43855133051539244fcab1050f9938a0160a0a3ad13a69f5cf99fdbbcd19733c282c61ca523b88e91b",
    "signer": "0x5FCFd5b38744Dd2597489561951d9090bd8F3D59",
    "userId": "173028850"
  }
}