{
  "manageEntity": {
    "action": "Update",
    "entityId": "966301573",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x10fa31f1160c06beb91878c429637fb152aa641f29ebdf881855da7a62d2af0c",
    "signature": "0x2877ef76b72ea24e083571ddb54dcb3a29fb76cb9329f394d9552173f48b664950620d6f13e013d18b8a45145601a061e81ce98b1b99525d3ff1ff020eabac651b",
    "signer": "0x55349D5C27fA01d528A1486a01312CC1A8C55c15",
    "userId": "966301573"
  }
}