{
  "manageEntity": {
    "action": "Update",
    "entityId": "664991753",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5eb1de78c469d19e0af4d23e10f8b888e82dc4200eb7cc4328a480f0ae9223f6",
    "signature": "0xd7a96e22aa62cfd70d81f38e4c9f928d98ae3cf6a49dc64afc644221e5c90d1c568e7fd3af0073e8ec08e8b74f8ad11b1a8d4ab41330768862c36b20a6b9e1211c",
    "signer": "0xf034511ba85caD07c6D9c627B2E63af3306524AF",
    "userId": "664991753"
  }
}