{
  "manageEntity": {
    "action": "Update",
    "entityId": "554920508",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd85039a573f3e8218876e3454d314847ee8b98ade18999509292c82f4f122faf",
    "signature": "0xc0e2affab34e2356f4053ae94f8a7a77ddce524717b0d2261456724bf3df2b1664bfb855fe56784466c8ba9e2a0f6486e675bcae3c4bd5a1cb0ba20a37397f741b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}