{
  "manageEntity": {
    "action": "Update",
    "entityId": "552753858",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x83b12a26d0b604e13a2217f351516672981d3d0ec25d9cee612c6037bbdf5380",
    "signature": "0xf2c5ddb6c827e7284676e58822dddb43fbce1c7ffb8854a25160ac1b679e18fd360687ffebd031fd9ed81db1cf3d710c56cd763b129393348a52badec2648d161b",
    "signer": "0x8E3A4E1A0d1Aa7628E0FDbc872062F921A449403",
    "userId": "552753858"
  }
}