{
  "manageEntity": {
    "action": "Update",
    "entityId": "573973668",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2e4e708ad45201c3377e2bfa8e9e2ade0cf7c4753435ed462c9d688c570b7b9f",
    "signature": "0x8c9c673675ed35dd01c73b6121593a446adb1c936534213225fadca8ae46e49472b5f5e3963bacb0c4ab19012d621acf820fc020e882da3dfc5c1135d6c53cf61b",
    "signer": "0xFf6Ffd39AbD6a34Cf0cB3C4346205c902dA8093E",
    "userId": "573973668"
  }
}