{
  "manageEntity": {
    "action": "Update",
    "entityId": "742035512",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x965a2be1081dbe60c4ffb34746170eb35525fe0aa38e9c946fbb0f938b33074b",
    "signature": "0xa6fbf53a57502b09c4ba8af0e28d3ed61ebd3691cd181554ea9f56eb7bf7da57133e76b1b53310688fc4ed71e2c711dca7ebea0de26877a35a2e21a6289f28e71c",
    "signer": "0x429460374e33f10e8a227713a7d240bFd681a266",
    "userId": "742035512"
  }
}