{
  "manageEntity": {
    "action": "Update",
    "entityId": "783337209",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieragtr2d3po2wfsmvwtbqpaenlqsydjahkegiwghlwg5udqr3zfdyxq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":528111543},{\"type\":\"playlist\",\"playlist_id\":966050134},{\"type\":\"playlist\",\"playlist_id\":1899556335}]}}}",
    "nonce": "0x6f6f7e4b31ba9e1e7493228b8e0a72912f360574c828b52827ad79fd75505d9a",
    "signature": "0xa0fde4b3ed4b34e2ce392b0c17ecec1df9804f7b8e452cd4d1c9f646b06b92514dd1ddc52cf175371e420c70252db8372bc3186c53fef503a4d7741f708a824b1b",
    "signer": "0xdB453B3e8F14c70b8129c91f28aFFc16291F53f1",
    "userId": "783337209"
  }
}