{
  "manageEntity": {
    "action": "Update",
    "entityId": "53170200",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x60b0cf6e5f7619e9924888c44ce58298899c0189fd2cd9e6c84f8a3cd0aa2a2b",
    "signature": "0x794430d3688dafe6aa7d47f033e8d673960e04132db4a06909c6592bc99f84c36aed1a3fb5c0d4651b35d008699e9569b6f7ccf0323cb75119138942139063681c",
    "signer": "0x9ca6299F13C8dC489A0624c2bec05f3CDaB9f407",
    "userId": "53170200"
  }
}