{
  "manageEntity": {
    "action": "Update",
    "entityId": "198890948",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieragxgvjmj7qewjfmodrulnlheayeehzkvv3f7rc5sy6s74yrpq7hbq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1678739187}]}}}",
    "nonce": "0x56c6ae452c2f9bc15db3316fb4ce285978d07d789172945f118f8ccf83ff19d1",
    "signature": "0x545e7526aeba57d427449443a74cd479c3b9e8a557b1dfa44cc524ca4ddee051788dad56999bd276aeb0e927c4e448de8558bf1c2fef528fdf1370429e899f581c",
    "signer": "0xaDC9D4604F02A3d510468234256a0815f96F0D3C",
    "userId": "198890948"
  }
}