{
  "manageEntity": {
    "action": "Update",
    "entityId": "603536841",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xeb0ac45e9d82300187dae6d659ea0ca169665c8244aa9f9daaa6dfe9d06b4f40",
    "signature": "0xe11a6158c6a08f4131c3055cb3d07871992a65e00152bcc7aa6063de9c6d555238d60ff1488473554accd9cf81fceca31d917ca0fe0afc422c28af01bf32c7c61c",
    "signer": "0x50C788e98653bf302c8bABD4990de951be4A7579",
    "userId": "603536841"
  }
}