{
  "manageEntity": {
    "action": "Update",
    "entityId": "900416093",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xdc24e8aec6d57374afa7402e548ee6b434d9cdbaf4020eb0f5fc583e156f4b0f",
    "signature": "0x834b191b7a933091faa9f6d59b577a1cf6562da759887b469621a967266a09552b6b580e6d05d0a228d2c3f27162dbb1fb79d322120ce11cd9ad9a61f8558e511b",
    "signer": "0xf399Ef3A18BD7C0De206619229371a9f28c8D86b",
    "userId": "900416093"
  }
}