{
  "manageEntity": {
    "action": "Update",
    "entityId": "621042450",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xefcf6e11d6413794cdfcdee60b50b4594b8e00e9b854bde196f4e6e585dbb09f",
    "signature": "0x9a8d4a216fec1f46f7a16dc167f2ba427aea995036cf5b7d20632908216bde8351e20a080e178566b5b7ef9412d8c3112c63e040ecf697f23b2783e3df9b3af21c",
    "signer": "0xE3302ea03434dA998C2fcf0647E2Ad4c5a29e4f1",
    "userId": "621042450"
  }
}