{
  "manageEntity": {
    "action": "Update",
    "entityId": "439961721",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xdd79a0d2befd8017efa5e8e38e7190df9a2e77a2a73ab0445558a71ec8572280",
    "signature": "0xb2484a388e22768cd18de7bef285340d7c8905e0f99a6c68b6d04637ef49fa814599e7bf20aa54e0023d7d1dce74434e29557e06ce6a19a11d66ff5b154870561c",
    "signer": "0xA78Bb948Abf642E3c239b1050053d913a7D0840B",
    "userId": "439961721"
  }
}